<?xml version="1.0" encoding="UTF-8" standalone="yes"?><oembed><version><![CDATA[1.0]]></version><provider_name><![CDATA[justpuzzles]]></provider_name><provider_url><![CDATA[https://justpuzzles.wordpress.com]]></provider_url><author_name><![CDATA[Teun Spaans]]></author_name><author_url><![CDATA[https://justpuzzles.wordpress.com/author/teunspaans/]]></author_url><title><![CDATA[Pyramid &#8211; can you&nbsp;count?]]></title><type><![CDATA[link]]></type><html><![CDATA[<p><a href="https://justpuzzles.wordpress.com/2016/04/22/pyramid/tetrahedron/" rel="attachment wp-att-4286"><img loading="lazy" data-attachment-id="4286" data-permalink="https://justpuzzles.wordpress.com/2016/04/22/pyramid/tetrahedron/" data-orig-file="https://justpuzzles.files.wordpress.com/2016/03/tetrahedron.jpg" data-orig-size="280,264" data-comments-opened="1" data-image-meta="{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}" data-image-title="Tetrahedron" data-image-description="" data-image-caption="" data-medium-file="https://justpuzzles.files.wordpress.com/2016/03/tetrahedron.jpg?w=280" data-large-file="https://justpuzzles.files.wordpress.com/2016/03/tetrahedron.jpg?w=280" src="https://justpuzzles.files.wordpress.com/2016/03/tetrahedron.jpg?w=280&#038;h=264" alt="Tetrahedron" width="280" height="264" class="alignnone size-full wp-image-4286" srcset="https://justpuzzles.files.wordpress.com/2016/03/tetrahedron.jpg 280w, https://justpuzzles.files.wordpress.com/2016/03/tetrahedron.jpg?w=150&amp;h=141 150w" sizes="(max-width: 280px) 100vw, 280px" /></a><br />
Suppose we have a tetrahedon, and cut of all 4 corners. That gives us a new shape with new corners, from which we cut off again all corners. How many corners does the resulting figure have?</p>
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