{"id":15166,"date":"2025-05-07T14:40:15","date_gmt":"2025-05-07T05:40:15","guid":{"rendered":"https:\/\/biz.moneyforward.com\/work-efficiency\/basic\/?p=15166"},"modified":"2025-05-07T14:40:15","modified_gmt":"2025-05-07T05:40:15","slug":"%e3%82%a8%e3%82%af%e3%82%bb%e3%83%ab%e3%81%a7%e5%86%86%e5%91%a8%e7%8e%87%ef%bc%88%cf%80%ef%bc%89%e3%82%92%e6%b1%82%e3%82%81%e3%82%8bpi%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%be","status":"publish","type":"post","link":"https:\/\/biz.moneyforward.com\/work-efficiency\/basic\/15166\/","title":{"rendered":"\u30a8\u30af\u30bb\u30eb\u3067\u5186\u5468\u7387\uff08\u03c0\uff09\u3092\u6c42\u3081\u308bPI\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u307e\u3068\u3081"},"content":{"rendered":"<p>\u30a8\u30af\u30bb\u30eb\u3067\u306f\u3001\u6570\u5b66\u7684\u306a\u8a08\u7b97\u3084\u7d71\u8a08\u51e6\u7406\u3092\u884c\u3046\u969b\u306b\u4fbf\u5229\u306a\u95a2\u6570\u304c\u8c4a\u5bcc\u306b\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u4e2d\u3067\u3082\u3001\u5186\u5468\u7387\uff08\u03c0 \uff1a\u5186\u306e\u76f4\u5f84\u306b\u5bfe\u3059\u308b\u5186\u5468\u306e\u6bd4\u7387\uff09\u3092\u7c21\u5358\u306b\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u300cPI\u95a2\u6570\u300d\u306f\u3001\u7279\u306b \u5e7e\u4f55\u5b66\u7684\u306a\u8a08\u7b97\u3084\u7d71\u8a08\u5b66\u3001\u7269\u7406\u5b66\u306e\u8a08\u7b97\u306a\u3069\u306b\u304a\u3044\u3066\u5f79\u7acb\u3061\u307e\u3059\u3002\u3053\u306e\u30ea\u30fc\u30c9\u6587\u3067\u306f\u3001PI\u95a2\u6570\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3084\u3001\u5177\u4f53\u7684\u306a\u5229\u7528\u30b7\u30fc\u30f3\u306b\u3064\u3044\u3066\u89e6\u308c\u3001\u30a8\u30af\u30bb\u30eb\u3067\u5186\u5468\u7387\u3092\u8a08\u7b97\u3059\u308b\u969b\u306e\u624b\u52a9\u3051\u3068\u306a\u308b\u60c5\u5831\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<div id=\"post-below-intro\"><\/div><h2>PI\u95a2\u6570\u306e\u4f7f\u3044\u65b9<\/h2>\n<p><span style=\"background-color: #ffff99;\"><b>PI\u95a2\u6570\u306f\u3001\u6570\u5b66\u3084\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u5186\u5468\u7387\u03c0\u306e\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/b><\/span>\u3053\u306e\u95a2\u6570\u306f\u591a\u304f\u306e\u5834\u5408\u3067\u5fc5\u8981\u4e0d\u53ef\u6b20\u306a\u3082\u306e\u3067\u3042\u308a\u3001\u5186\u3084\u70b9\u306b\u95a2\u3059\u308b\u8a08\u7b97\u306a\u3069\u3001\u69d8\u3005\u306a\u30b7\u30fc\u30f3\u3067\u5229\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u4f7f\u3044\u65b9\u3092\u8a73\u3057\u304f\u8aac\u660e\u3044\u305f\u3057\u307e\u3059\u3002<\/p>\n<h3>\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/h3>\n<p><span style=\"background-color: #ffff99;\"><b>PI\u95a2\u6570\u306f\u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb\u3067\u3001\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u3060\u3051\u3067\u5186\u5468\u7387\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/b><\/span>\u7279\u306b\u3001Excel\u3084Google\u30b9\u30d7\u30ec\u30c3\u30c9\u30b7\u30fc\u30c8\u306a\u3069\u306e\u8868\u8a08\u7b97\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u306f\u3001\u7c21\u5358\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001Excel\u306b\u304a\u3044\u3066\u306f<\/p>\n<p>=PI( )<\/p>\n<p>\u3068\u5165\u529b\u3059\u308b\u3060\u3051\u3067\u3001\u5186\u5468\u7387\u306e\u5024\u3067\u3042\u308b3.14159265358979\u304c\u5f97\u3089\u308c\u307e\u3059\uff08Excel\u3067\u306f\u4e00\u822c\u7684\u306b\u7528\u3044\u3089\u308c\u308b\u7d043.14\u3088\u308a\u3082\u591a\u304f\u306e\u6841\u6570\u3067\u3088\u308a\u6b63\u78ba\u306a\u5024\u306b\u306a\u3063\u3066\u3044\u308b\uff09\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001Web\u7248\u3084Mac\u7248\u306eExcel\u3067\u3082\u540c\u3058\u3088\u3046\u306b=PI()\u3067\u4f7f\u7528\u3067\u304d\u307e\u3059\u304c\u3001\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u306fUI\u3084\u30e1\u30cb\u30e5\u30fc\u8868\u793a\u304c\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u5186\u306e\u9762\u7a4d\u3084\u5468\u9577\u306e\u8a08\u7b97<\/h3>\n<p><span style=\"background-color: #ffff99;\"><b>\u5186\u306b\u95a2\u3059\u308b\u8a08\u7b97\u3092\u884c\u3046\u969b\u3001PI\u95a2\u6570\u306f\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/b><\/span>\u5186\u306e\u9762\u7a4d\u306f\u534a\u5f84\u306e\u4e8c\u4e57\u306b\u5186\u5468\u7387\u3092\u639b\u3051\u305f\u3082\u306e\u3067\u3042\u308a\u3001\u305d\u308c\u306f\u6570\u5b66\u7684\u306b\u6b21\u306e\u3088\u3046\u306b\u8868\u3055\u308c\u307e\u3059\u3002<\/p>\n<div style=\"border: 2px solid #0054ac; padding: 10px 20px; border-radius: 0px; margin-bottom: 1em; text-align: left;\"><strong>\u5186\u306e\u9762\u7a4d = \u03c0 \u00d7 \u534a\u5f84\u00b2<\/strong><\/div>\n<p>\u4f8b\u3048\u3070\u3001\u534a\u5f84\u304c5\u306e\u5186\u306e\u9762\u7a4d\u3092\u8a08\u7b97\u3059\u308b\u5834\u5408\u3001PI\u95a2\u6570\u3092\u4f7f\u3063\u3066\u6b21\u306e\u3088\u3046\u306b\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n<p>=PI( ) * (5^2)<\/p>\n<p>\u3068\u5165\u529b\u3059\u308c\u3070\u3001\u5186\u306e\u9762\u7a4d\u306f\u7d0478.54\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u5186\u306e\u5468\u9577\u3092\u8a08\u7b97\u3059\u308b\u969b\u306b\u3082\u3001PI\u95a2\u6570\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002\u5468\u9577\u306f\u534a\u5f84\u306b\u5186\u5468\u7387\u3092\u639b\u3051\u30662\u500d\u3057\u305f\u3082\u306e\u3067\u3042\u308a\u3001\u6570\u5f0f\u3067\u8868\u3059\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div style=\"border: 2px solid #0054ac; padding: 10px 20px; border-radius: 0px; margin-bottom: 1em; text-align: left;\"><strong>\u5186\u306e\u5468\u9577 = 2 \u00d7 \u03c0 \u00d7 \u534a\u5f84<\/strong><\/div>\n<p>\u540c\u69d8\u306b\u3001\u4e0a\u8a18\u306e\u4f8b\u3092\u4f7f\u3046\u3068\u3001\u5468\u9577\u306f=2 * PI() * 5\u3068\u3059\u308b\u3053\u3068\u3067\u7d0431.42\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u6d3b\u7528<\/h3>\n<p><span style=\"background-color: #ffff99;\"><b>PI\u95a2\u6570\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5206\u91ce\u3067\u3082\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/b><\/span>\u4f8b\u3048\u3070\u3001Python\u3084JavaScript\u306a\u3069\u306e\u8a00\u8a9e\u3067\u306f\u3001\u5186\u5468\u7387\uff08\u03c0\uff09\u306e\u5b9a\u6570\uff08\u3042\u3089\u304b\u3058\u3081\u5024\u304c\u6c7a\u307e\u3063\u3066\u3044\u308b\u6570\u5b57\uff09\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u3053\u308c\u3092\u4f7f\u7528\u3057\u3066\u8a08\u7b97\u3092\u884c\u3044\u307e\u3059\u3002Python\u3067\u306f\u3001math\u30e2\u30b8\u30e5\u30fc\u30eb\uff08\u6570\u5b66\u7528\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\uff09\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u3053\u3068\u3067\u7c21\u5358\u306bPI\u3092\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306fPython\u3067\u306e\u4f7f\u7528\u4f8b\u3067\u3059\u3002<\/p>\n<p>import math<\/p>\n<p>radius = 5<\/p>\n<p>area = math.pi * (radius ** 2)<\/p>\n<p>circumference = 2 * math.pi * radius<\/p>\n<p>print(f&#8221;Area: {area}, Circumference: {circumference}&#8221;)<\/p>\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u30d7\u30ed\u30b0\u30e9\u30de\u306f\u9ad8\u5ea6\u306a\u6570\u5b66\u7684\u8a08\u7b97\u3092\u7c21\u5358\u306b\u6271\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>PI\u95a2\u6570\u306e\u5229\u7528\u30b7\u30fc\u30f3<\/h2>\n<p><span style=\"background-color: #ffff99;\"><b>PI\u95a2\u6570\u306f\u3001\u6570\u5b66\u3084\u79d1\u5b66\u3001\u5de5\u5b66\u306e\u3055\u307e\u3056\u307e\u306a\u5206\u91ce\u3067\u5e45\u5e83\u304f\u5229\u7528\u3055\u308c\u308b\u57fa\u672c\u7684\u306a\u95a2\u6570\u3067\u3059\u3002<\/b><\/span>\u3053\u306e\u95a2\u6570\u306f\u5186\u5468\u7387\u03c0\u306e\u5024\u3092\u8fd4\u3059\u3082\u306e\u3067\u3042\u308a\u3001\u305d\u306e\u6570\u5024\u306f\u4e00\u822c\u7684\u306b\u7528\u3044\u3089\u308c\u308b\u7d043.14\u3068\u3044\u3046\u5024\u3088\u308a\u6b63\u78ba\u306a\u7d043.14159265358979 \u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001PI\u95a2\u6570\u304c\u3069\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u6d3b\u7528\u3055\u308c\u308b\u306e\u304b\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h3>\u6570\u5b66\u7684\u306a\u8a08\u7b97\u306b\u304a\u3051\u308b\u6d3b\u7528<\/h3>\n<p><span style=\"background-color: #ffff99;\"><b>\u307e\u305a\u3001\u6700\u3082\u4e00\u822c\u7684\u306a\u5229\u7528\u30b7\u30fc\u30f3\u306f\u6570\u5b66\u7684\u8a08\u7b97\u3067\u3059\u3002<\/b><\/span>\u7279\u306b\u5186\u3084\u5186\u306e\u95a2\u9023\u3059\u308b\u554f\u984c\u306b\u304a\u3044\u3066\u3001\u5186\u306e\u9762\u7a4d\u3084\u5186\u5468\u3092\u6c42\u3081\u308b\u969b\u306bPI\u95a2\u6570\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u5186\u306e\u9762\u7a4d\u306f\u300c\u03c0 \u00d7 r\u00b2\u300d\u3067\u8a08\u7b97\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u5f0f\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u3055\u307e\u3056\u307e\u306a\u534a\u5f84\u306e\u5186\u9762\u7a4d\u3092\u7c21\u5358\u306b\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u79d1\u5b66\u6280\u8853\u5206\u91ce\u3067\u306e\u5fdc\u7528<\/h3>\n<p><span style=\"background-color: #ffff99;\"><b>\u6b21\u306b\u3001\u79d1\u5b66\u3084\u5de5\u5b66\u306e\u5206\u91ce\u3067\u3082PI\u95a2\u6570\u306f\u91cd\u8981\u3067\u3059\u3002<\/b><\/span>\u7269\u7406\u5b66\u3067\u306f\u6ce2\u306e\u6027\u8cea\uff08\u4f8b\uff1a\u97f3\u3084\u5149\u306e\u632f\u52d5\uff09\u3084\u5186\u904b\u52d5\uff08\u7269\u4f53\u304c\u5186\u3092\u63cf\u304f\u3088\u3046\u306b\u52d5\u304f\u52d5\u304d\uff09\u306e\u969b\u306b\u3001\u5186\u5468\u7387\u304c\u5fc5\u8981\u3068\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u306b\u304a\u3044\u3066\u3082\u3001\u30c8\u30f3\u30cd\u30eb\u3084\u6a4b\u6881\u306e\u8a2d\u8a08\u3001\u56de\u8ee2\u4f53\u306e\u52d5\u4f5c\u89e3\u6790\u306a\u3069\u3001\u5186\u306b\u95a2\u9023\u3059\u308b\u30e2\u30c7\u30eb\u3067\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001\u5186\u306e\u5f62\u3084\u52d5\u304d\u306b\u95a2\u308f\u308b\u69cb\u9020\u7269\u306e\u6b63\u78ba\u306a\u8a08\u7b97\u306bPI\u95a2\u6570\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<h3>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306e\u5f79\u5272<\/h3>\n<p><span 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