{"categories":["\u30e1\u30e2","\u6570\u5b66"],"width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdosei.hatenadiary.jp%2Fentry%2F20050926%2Fp3\" title=\" \u6b6320\u9762\u4f53 icosahedron - DOSEI\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u9ec4\u91d1\u6bd4 (golden ratio) \u03c6:=(1+\u221a5)/2 \u306b\u5bfe\u3057\u3066\u3001 \u6b21\u306e12\u70b9\u306f\u6b6320\u9762\u4f53\u306e\u9802\u70b9\u306b\u306a\u308b\uff08\u8907\u53f7\u4efb\u610f\uff09\u3002 (0, \u00b1\u03c6, \u00b11) (\u00b11, 0, \u00b1\u03c6) (\u00b1\u03c6, \u00b11, 0) \u3053\u306e\u3068\u304d\u3001\u5916\u63a5\u7403\u306e\u534a\u5f84\u306f \u221a(\u03c62+1)","height":"190","url":"https://dosei.hatenadiary.jp/entry/20050926/p3","blog_url":"https://dosei.hatenadiary.jp/","type":"rich","blog_title":"DOSEI\u306e\u65e5\u8a18","title":" \u6b6320\u9762\u4f53 icosahedron","author_url":"https://blog.hatena.ne.jp/DOSEI/","published":"2005-09-26 00:00:01","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","image_url":null,"version":"1.0","author_name":"DOSEI"}