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	<id>https://wiki.universitas.ro/index.php?action=history&amp;feed=atom&amp;title=S%3AE20.56</id>
	<title>S:E20.56 - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://wiki.universitas.ro/index.php?action=history&amp;feed=atom&amp;title=S%3AE20.56"/>
	<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=S:E20.56&amp;action=history"/>
	<updated>2026-05-01T09:55:24Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wiki.universitas.ro/index.php?title=S:E20.56&amp;diff=10538&amp;oldid=prev</id>
		<title>Andrei.Horvat at 08:11, 7 January 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=S:E20.56&amp;diff=10538&amp;oldid=prev"/>
		<updated>2025-01-07T08:11:11Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 08:11, 7 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l8&quot;&gt;Line 8:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 8:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cum &amp;#039;&amp;#039;&amp;lt;math&amp;gt;\sphericalangle A = 36^\circ&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; și triunghiul &amp;#039;&amp;#039;&amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; este isoscel, se obține că &amp;lt;math&amp;gt;\sphericalangle B = \sphericalangle C = 72^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle ABD = \sphericalangle DBC = 36^\circ&amp;lt;/math&amp;gt;, deci &amp;lt;math&amp;gt;\sphericalangle BDC = 72^\circ&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cum &amp;#039;&amp;#039;&amp;lt;math&amp;gt;\sphericalangle A = 36^\circ&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; și triunghiul &amp;#039;&amp;#039;&amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; este isoscel, se obține că &amp;lt;math&amp;gt;\sphericalangle B = \sphericalangle C = 72^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle ABD = \sphericalangle DBC = 36^\circ&amp;lt;/math&amp;gt;, deci &amp;lt;math&amp;gt;\sphericalangle BDC = 72^\circ&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cum &amp;lt;math&amp;gt;ME&amp;lt;/math&amp;gt; este mediatoarea segmentului &amp;lt;math&amp;gt;AD&amp;lt;/math&amp;gt;, rezultă că &amp;lt;math&amp;gt;AED&amp;lt;/math&amp;gt; este un triunghi isoscel, cu &amp;lt;math&amp;gt;\sphericalangle A = \sphericalangle D = 36^\circ&amp;lt;/math&amp;gt;, deci &amp;lt;math&amp;gt;\sphericalangle &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;AED &lt;/del&gt;= &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;108&lt;/del&gt;^\circ&amp;lt;/math&amp;gt;. Atunci &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;math&amp;gt;\sphericalangle BED = 72^\circ&amp;lt;/math&amp;gt;, ceea ce implică &lt;/del&gt;&amp;lt;math&amp;gt;\sphericalangle EDB = 72^\circ&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cum &amp;lt;math&amp;gt;ME&amp;lt;/math&amp;gt; este mediatoarea segmentului &amp;lt;math&amp;gt;AD&amp;lt;/math&amp;gt;, rezultă că &amp;lt;math&amp;gt;AED&amp;lt;/math&amp;gt; este un triunghi isoscel, cu &amp;lt;math&amp;gt;\sphericalangle A = \sphericalangle D = 36^\circ&amp;lt;/math&amp;gt;, deci &amp;lt;math&amp;gt;\sphericalangle &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ADE &lt;/ins&gt;= &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;36&lt;/ins&gt;^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle EDB = 72^\circ&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;În concluzie, &amp;lt;math&amp;gt;\sphericalangle BDC = \sphericalangle EDB= 72^\circ&amp;lt;/math&amp;gt;, ceea ce impică faptul că &amp;lt;math&amp;gt;DB&amp;lt;/math&amp;gt; este bisectoare pentru unghiul &amp;lt;math&amp;gt;CDE&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;În concluzie, &amp;lt;math&amp;gt;\sphericalangle BDC = \sphericalangle EDB= 72^\circ&amp;lt;/math&amp;gt;, ceea ce impică faptul că &amp;lt;math&amp;gt;DB&amp;lt;/math&amp;gt; este bisectoare pentru unghiul &amp;lt;math&amp;gt;CDE&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=S:E20.56&amp;diff=10537&amp;oldid=prev</id>
		<title>Andrei.Horvat at 08:09, 7 January 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=S:E20.56&amp;diff=10537&amp;oldid=prev"/>
		<updated>2025-01-07T08:09:16Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 08:09, 7 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l8&quot;&gt;Line 8:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 8:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cum &amp;#039;&amp;#039;&amp;lt;math&amp;gt;\sphericalangle A = 36^\circ&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; și triunghiul &amp;#039;&amp;#039;&amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; este isoscel, se obține că &amp;lt;math&amp;gt;\sphericalangle B = \sphericalangle C = 72^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle ABD = \sphericalangle DBC = 36^\circ&amp;lt;/math&amp;gt;, deci &amp;lt;math&amp;gt;\sphericalangle BDC = 72^\circ&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cum &amp;#039;&amp;#039;&amp;lt;math&amp;gt;\sphericalangle A = 36^\circ&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; și triunghiul &amp;#039;&amp;#039;&amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;&amp;#039;&amp;#039; este isoscel, se obține că &amp;lt;math&amp;gt;\sphericalangle B = \sphericalangle C = 72^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle ABD = \sphericalangle DBC = 36^\circ&amp;lt;/math&amp;gt;, deci &amp;lt;math&amp;gt;\sphericalangle BDC = 72^\circ&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cum &amp;lt;math&amp;gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;DE&lt;/del&gt;&amp;lt;/math&amp;gt; este mediatoarea segmentului &amp;lt;math&amp;gt;AD&amp;lt;/math&amp;gt;, rezultă că &amp;lt;math&amp;gt;AED&amp;lt;/math&amp;gt; este un triunghi isoscel, cu &amp;lt;math&amp;gt;\sphericalangle A = \sphericalangle D = 36^\circ&amp;lt;/math&amp;gt;, deci &amp;lt;math&amp;gt;\sphericalangle AED = 108^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle BED = 72^\circ&amp;lt;/math&amp;gt;, ceea ce implică &amp;lt;math&amp;gt;\sphericalangle EDB = 72^\circ&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cum &amp;lt;math&amp;gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ME&lt;/ins&gt;&amp;lt;/math&amp;gt; este mediatoarea segmentului &amp;lt;math&amp;gt;AD&amp;lt;/math&amp;gt;, rezultă că &amp;lt;math&amp;gt;AED&amp;lt;/math&amp;gt; este un triunghi isoscel, cu &amp;lt;math&amp;gt;\sphericalangle A = \sphericalangle D = 36^\circ&amp;lt;/math&amp;gt;, deci &amp;lt;math&amp;gt;\sphericalangle AED = 108^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle BED = 72^\circ&amp;lt;/math&amp;gt;, ceea ce implică &amp;lt;math&amp;gt;\sphericalangle EDB = 72^\circ&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;În concluzie, &amp;lt;math&amp;gt;\sphericalangle BDC = \sphericalangle EDB= 72^\circ&amp;lt;/math&amp;gt;, ceea ce impică faptul că &amp;lt;math&amp;gt;DB&amp;lt;/math&amp;gt; este bisectoare pentru unghiul &amp;lt;math&amp;gt;CDE&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;În concluzie, &amp;lt;math&amp;gt;\sphericalangle BDC = \sphericalangle EDB= 72^\circ&amp;lt;/math&amp;gt;, ceea ce impică faptul că &amp;lt;math&amp;gt;DB&amp;lt;/math&amp;gt; este bisectoare pentru unghiul &amp;lt;math&amp;gt;CDE&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=S:E20.56&amp;diff=10536&amp;oldid=prev</id>
		<title>Andrei.Horvat at 08:08, 7 January 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=S:E20.56&amp;diff=10536&amp;oldid=prev"/>
		<updated>2025-01-07T08:08:24Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 08:08, 7 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l6&quot;&gt;Line 6:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 6:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;Soluție&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;Soluție&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cum &#039;&#039;&amp;lt;math&amp;gt;\sphericalangle A = 36^\circ&amp;lt;/math&amp;gt;&#039;&#039; și triunghiul &#039;&#039;&amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;&#039;&#039; este isoscel, se obține că &amp;lt;math&amp;gt;\sphericalangle B = \sphericalangle C = 72^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle ABD = \sphericalangle DBC = 36^\circ&amp;lt;/math&amp;gt;, deci \sphericalangle &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ABD&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Cum &#039;&#039;&amp;lt;math&amp;gt;\sphericalangle A = 36^\circ&amp;lt;/math&amp;gt;&#039;&#039; și triunghiul &#039;&#039;&amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;&#039;&#039; este isoscel, se obține că &amp;lt;math&amp;gt;\sphericalangle B = \sphericalangle C = 72^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle ABD = \sphericalangle DBC = 36^\circ&amp;lt;/math&amp;gt;, deci &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;math&amp;gt;&lt;/ins&gt;\sphericalangle &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;BDC = 72^\circ&amp;lt;/math&amp;gt;.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Cum &amp;lt;math&amp;gt;DE&amp;lt;/math&amp;gt; este mediatoarea segmentului &amp;lt;math&amp;gt;AD&amp;lt;/math&amp;gt;, rezultă că &amp;lt;math&amp;gt;AED&amp;lt;/math&amp;gt; este un triunghi isoscel, cu &amp;lt;math&amp;gt;\sphericalangle A = \sphericalangle D = 36^\circ&amp;lt;/math&amp;gt;, deci &amp;lt;math&amp;gt;\sphericalangle AED = 108^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle BED = 72^\circ&amp;lt;/math&amp;gt;, ceea ce implică &amp;lt;math&amp;gt;\sphericalangle EDB = 72^\circ&amp;lt;/math&amp;gt;.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;În concluzie, &amp;lt;math&amp;gt;\sphericalangle BDC = \sphericalangle EDB= 72^\circ&amp;lt;/math&amp;gt;, ceea ce impică faptul că &amp;lt;math&amp;gt;DB&amp;lt;/math&amp;gt; este bisectoare pentru unghiul &amp;lt;math&amp;gt;CDE&amp;lt;/math&amp;gt;.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=S:E20.56&amp;diff=10535&amp;oldid=prev</id>
		<title>Andrei.Horvat at 08:02, 7 January 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=S:E20.56&amp;diff=10535&amp;oldid=prev"/>
		<updated>2025-01-07T08:02:02Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 08:02, 7 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[File:SGM S-E20-56.png|thumb]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;S:E20.56 (Cristina Vijdeluc, Mihai Vijdeluc)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;S:E20.56 (Cristina Vijdeluc, Mihai Vijdeluc)&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l4&quot;&gt;Line 4:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 5:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;Soluție&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;Soluție&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Cum &#039;&#039;&amp;lt;math&amp;gt;\sphericalangle A = 36^\circ&amp;lt;/math&amp;gt;&#039;&#039; și triunghiul &#039;&#039;&amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;&#039;&#039; este isoscel, se obține că &amp;lt;math&amp;gt;\sphericalangle B = \sphericalangle C = 72^\circ&amp;lt;/math&amp;gt;. Atunci &amp;lt;math&amp;gt;\sphericalangle ABD = \sphericalangle DBC = 36^\circ&amp;lt;/math&amp;gt;, deci \sphericalangle ABD&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
	<entry>
		<id>https://wiki.universitas.ro/index.php?title=S:E20.56&amp;diff=10533&amp;oldid=prev</id>
		<title>Andrei.Horvat: Created page with &quot;&#039;&#039;&#039;S:E20.56 (Cristina Vijdeluc, Mihai Vijdeluc)&#039;&#039;&#039;  &#039;&#039;Se consideră triunghiul &lt;math&gt;ABC&lt;/math&gt;, cu &lt;math&gt;AB=AC&lt;/math&gt; și &lt;math&gt;\sphericalangle A = 36^\circ&lt;/math&gt;. Punctul &lt;math&gt;D&lt;/math&gt; aparține laturii &lt;math&gt;AC&lt;/math&gt; astfel încât &lt;math&gt;BD&lt;/math&gt; este bisectoarea unghiului &lt;math&gt;ABC&lt;/math&gt;. Mediatorarea segmentului &lt;math&gt;AD&lt;/math&gt; intersectează latura &lt;math&gt;AB&lt;/math&gt; în &lt;math&gt;E&lt;/math&gt;. Arătați că &lt;math&gt;DB&lt;/math&gt; este bisectoare pentru unghiul &lt;math&gt;CDE&lt;/math&gt;...&quot;</title>
		<link rel="alternate" type="text/html" href="https://wiki.universitas.ro/index.php?title=S:E20.56&amp;diff=10533&amp;oldid=prev"/>
		<updated>2025-01-07T07:55:25Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;&amp;#039;&amp;#039;&amp;#039;S:E20.56 (Cristina Vijdeluc, Mihai Vijdeluc)&amp;#039;&amp;#039;&amp;#039;  &amp;#039;&amp;#039;Se consideră triunghiul &amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;, cu &amp;lt;math&amp;gt;AB=AC&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;\sphericalangle A = 36^\circ&amp;lt;/math&amp;gt;. Punctul &amp;lt;math&amp;gt;D&amp;lt;/math&amp;gt; aparține laturii &amp;lt;math&amp;gt;AC&amp;lt;/math&amp;gt; astfel încât &amp;lt;math&amp;gt;BD&amp;lt;/math&amp;gt; este bisectoarea unghiului &amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;. Mediatorarea segmentului &amp;lt;math&amp;gt;AD&amp;lt;/math&amp;gt; intersectează latura &amp;lt;math&amp;gt;AB&amp;lt;/math&amp;gt; în &amp;lt;math&amp;gt;E&amp;lt;/math&amp;gt;. Arătați că &amp;lt;math&amp;gt;DB&amp;lt;/math&amp;gt; este bisectoare pentru unghiul &amp;lt;math&amp;gt;CDE&amp;lt;/math&amp;gt;...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;S:E20.56 (Cristina Vijdeluc, Mihai Vijdeluc)&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;Se consideră triunghiul &amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;, cu &amp;lt;math&amp;gt;AB=AC&amp;lt;/math&amp;gt; și &amp;lt;math&amp;gt;\sphericalangle A = 36^\circ&amp;lt;/math&amp;gt;. Punctul &amp;lt;math&amp;gt;D&amp;lt;/math&amp;gt; aparține laturii &amp;lt;math&amp;gt;AC&amp;lt;/math&amp;gt; astfel încât &amp;lt;math&amp;gt;BD&amp;lt;/math&amp;gt; este bisectoarea unghiului &amp;lt;math&amp;gt;ABC&amp;lt;/math&amp;gt;. Mediatorarea segmentului &amp;lt;math&amp;gt;AD&amp;lt;/math&amp;gt; intersectează latura &amp;lt;math&amp;gt;AB&amp;lt;/math&amp;gt; în &amp;lt;math&amp;gt;E&amp;lt;/math&amp;gt;. Arătați că &amp;lt;math&amp;gt;DB&amp;lt;/math&amp;gt; este bisectoare pentru unghiul &amp;lt;math&amp;gt;CDE&amp;lt;/math&amp;gt;.&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Soluție&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;</summary>
		<author><name>Andrei.Horvat</name></author>
	</entry>
</feed>