{"id":586,"date":"2019-11-22T00:30:09","date_gmt":"2019-11-22T00:30:09","guid":{"rendered":"http:\/\/mathfun4kids.com\/mlog\/?p=586"},"modified":"2020-10-17T00:32:26","modified_gmt":"2020-10-17T00:32:26","slug":"solution-to-november-21-2019s-challenge","status":"publish","type":"post","link":"https:\/\/mathfun4kids.com\/mlog\/?p=586","title":{"rendered":"Solution to November 21, 2019&#8217;s Challenge"},"content":{"rendered":"\n<p>Actually, you can not make such a shape in our 3-dimension world \ud83d\ude42 You need to be living in a 4-dimension universe to construct $10$ equilateral triangles with only $10$ matchsticks. The 4-dimension object is called <a rel=\"noreferrer noopener\" href=\"https:\/\/en.wikipedia.org\/wiki\/5-cell\" target=\"_blank\"><strong>tetrahedral  pyramid<\/strong> or <strong>5-Cell<\/strong><\/a>. You can imagine it as a 3-dimensional <strong><a rel=\"noreferrer noopener\" href=\"https:\/\/en.wikipedia.org\/wiki\/Tetrahedron\" target=\"_blank\">tetrahedron<\/a><\/strong> with 4 lines drawn between its center and 4 vertices, such as: <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" src=\"https:\/\/mathfun4kids.com\/mlog\/wp-content\/uploads\/2020\/10\/Screen-Shot-2020-10-16-at-8.24.39-PM.png\" alt=\"\" class=\"wp-image-587\" width=\"244\" height=\"208\" srcset=\"https:\/\/mathfun4kids.com\/mlog\/wp-content\/uploads\/2020\/10\/Screen-Shot-2020-10-16-at-8.24.39-PM.png 488w, https:\/\/mathfun4kids.com\/mlog\/wp-content\/uploads\/2020\/10\/Screen-Shot-2020-10-16-at-8.24.39-PM-300x256.png 300w\" sizes=\"(max-width: 244px) 100vw, 244px\" \/><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Actually, you can not make such a shape in our 3-dimension world \ud83d\ude42 You need to be living in a 4-dimension universe to construct $10$ equilateral triangles with only $10$ matchsticks. The 4-dimension object is called tetrahedral pyramid or 5-Cell. &hellip; <a href=\"https:\/\/mathfun4kids.com\/mlog\/?p=586\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[14,7,9],"tags":[],"_links":{"self":[{"href":"https:\/\/mathfun4kids.com\/mlog\/index.php?rest_route=\/wp\/v2\/posts\/586"}],"collection":[{"href":"https:\/\/mathfun4kids.com\/mlog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mathfun4kids.com\/mlog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mathfun4kids.com\/mlog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mathfun4kids.com\/mlog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=586"}],"version-history":[{"count":2,"href":"https:\/\/mathfun4kids.com\/mlog\/index.php?rest_route=\/wp\/v2\/posts\/586\/revisions"}],"predecessor-version":[{"id":589,"href":"https:\/\/mathfun4kids.com\/mlog\/index.php?rest_route=\/wp\/v2\/posts\/586\/revisions\/589"}],"wp:attachment":[{"href":"https:\/\/mathfun4kids.com\/mlog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mathfun4kids.com\/mlog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mathfun4kids.com\/mlog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}