{"id":697,"date":"2009-02-26T12:58:00","date_gmt":"2009-02-26T11:58:00","guid":{"rendered":"http:\/\/www.walkingrandomly.com\/?p=697"},"modified":"2009-02-26T13:46:12","modified_gmt":"2009-02-26T12:46:12","slug":"albrecht-durers-heptagon","status":"publish","type":"post","link":"https:\/\/walkingrandomly.com\/?p=697","title":{"rendered":"Albrecht D\u00fcrer&#8217;s Heptagon"},"content":{"rendered":"<p>I first came across <a href=\"http:\/\/en.wikipedia.org\/wiki\/Albrecht_D%C3%BCrer\">Albrecht D\u00fcrer<\/a>, an artist from the 15th and 16th centuries, while looking into <a href=\"https:\/\/www.walkingrandomly.com\/?p=626\">pentaflakes<\/a> a little while back.\u00a0 In the comments section of the pentaflake post someone pointed me to a wonderful picture of a Rhino drawn by D\u00fcrer.<\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"aligncenter\" src=\"\/images\/random\/D\u00fcrer_-_Rhinoceros.jpg\" alt=\"Durer's Rhinoceros\" \/><\/p>\n<p>What makes this picture particularly amazing to me is that D\u00fcrer had never even seen a Rhino when he produced it.\u00a0 Well, thanks to the <a href=\"http:\/\/demonstrations.wolfram.com\/index.html\">Wolfram Demonstrations<\/a> project, D\u00fcrer has made another appearance in my consciousness.\u00a0 It turns out that he laid out a recipe for producing a heptagon using nothing more than a straight-edge and a compass and <a href=\"http:\/\/demonstrations.wolfram.com\/author.html?author=Ralf+Schaper\">Ralf Schaper<\/a> has brought this bang up to date by showing all of the steps in a Wolfram Demonstration.<\/p>\n<p style=\"text-align: center;\"><a href=\"http:\/\/demonstrations.wolfram.com\/AlbrechtDurersHeptagonOf1525\/\"><img decoding=\"async\" class=\"aligncenter\" src=\"\/images\/random\/durersHeptagon.jpg\" alt=\"Heptagon construction\" \/><\/a><\/p>\n<p>I wonder what other mathematics D\u00fcrer had a hand in?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I first came across Albrecht D\u00fcrer, an artist from the 15th and 16th centuries, while looking into pentaflakes a little while back.\u00a0 In the comments section of the pentaflake post someone pointed me to a wonderful picture of a Rhino drawn by D\u00fcrer. What makes this picture particularly amazing to me is that D\u00fcrer had [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[6,18],"tags":[],"class_list":["post-697","post","type-post","status-publish","format-standard","hentry","category-general-math","category-wolfram-demonstrations"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p3swhs-bf","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts\/697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=697"}],"version-history":[{"count":4,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts\/697\/revisions"}],"predecessor-version":[{"id":702,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts\/697\/revisions\/702"}],"wp:attachment":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}