{"provider_name":"Hatena Blog","title":"\u5186\u306e\u76f4\u5f84\u3068\u5186\u5468\u3068\u306e\u95a2\u4fc2","blog_url":"https://www.centeroftheearth.org/","width":"100%","author_name":"centeroftheearth","image_url":"https://daslabo.com/wp-content/uploads/%E5%9B%B3.png","type":"rich","categories":["\u30c8\u30b7"],"url":"https://www.centeroftheearth.org/entry/2016/02/06/000000","published":"2016-02-06 00:00:00","provider_url":"https://hatena.blog","description":"\u984c\u540d\uff1a\u5186\u306e\u76f4\u5f84\u3068\u5186\u5468\u3068\u306e\u95a2\u4fc2\u5831\u544a\u8005\uff1a\u30c8\u30b7 \u5186\u306e\u76f4\u5f84\u3068\u5186\u5468\u306b\u306f\u6df1\u3044\u95a2\u4fc2\u304c\u3042\u308b\u3002\u7b97\u6570\u3084\u6570\u5b66\u306b\u5f97\u610f\u306a\u4eba\u3067\u3042\u308c\u3070\u3001\u4f55\u3092\u4eca\u66f4\u3068\u3044\u3046\u554f\u984c\u3067\u306f\u3042\u308b\u3002\u305d\u306e\u5186\u306e\u76f4\u5f84\u3068\u5186\u5468\u306e\u95a2\u4fc2\u306e\u95a2\u4fc2\u5f0f\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3002\u5186\u5468/\u5186\u306e\u76f4\u5f84 = 3.14... (1)\u3053\u308c\u3092\u898b\u3066\u5206\u304b\u308b\u3088\u3046\u306b\u3001\u3069\u306e\u3088\u3046\u306a\u5186\u3067\u3042\u308c\u3001\u5186\u3067\u3042\u308b\u306a\u3089\u3070\u4e0d\u601d\u8b70\u3068\u4e0a\u8a18\u306e\u95a2\u4fc2\u5f0f\u304c\u6210\u308a\u7acb\u3064\u3002\u4e00\u822c\u5316\u3057\u3066\u3001\u5186\u306e\u534a\u5f84\u3092r\u3001\u5186\u5468\u3092l\u3068\u3059\u308b\u3068\u3001l = 2\u03c0r (2)\u3068\u306a\u308b\u30022r\u306f\u5186\u306e\u76f4\u5f84\u3068\u306a\u308a\u3001\u3053\u306e\u03c0(\u30d1\u30a4)\u304c\u30013.14...\u3067\u3042\u308a\u3001\u5186\u5468\u7387\u3068\u547c\u3070\u308c\u308b\u3002\u3053\u308c\u304c\u516c\u5f0f\u3092\u899a\u3048\u308b\u969b\u306e\u300c\u3048\u308b\u3044\u3053\u30fc\u308b\u306b\u3043\u3071\u3044\u3042\u30fc\u308b\u300d\u306e\u6697\u53f7\u306e\u5143\u3067\u3042\u308a\u3001(1)\u3068(2)\u306f\u307e\u3063\u305f\u304f\u540c\u3058\u610f\u5473\u3092\u793a\u3057\u3066\u3044\u308b\u3002\u3057\u304b\u3057\u306a\u304c\u2026","height":"190","version":"1.0","blog_title":"\u5730\u5e95\u305f\u308b\u8b0e\u306e\u7814\u7a76\u5ba4","author_url":"https://blog.hatena.ne.jp/centeroftheearth/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.centeroftheearth.org%2Fentry%2F2016%2F02%2F06%2F000000\" title=\"\u5186\u306e\u76f4\u5f84\u3068\u5186\u5468\u3068\u306e\u95a2\u4fc2 - \u5730\u5e95\u305f\u308b\u8b0e\u306e\u7814\u7a76\u5ba4\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}