{"id":2875,"date":"2013-01-22T22:54:39","date_gmt":"2013-01-22T13:54:39","guid":{"rendered":"http:\/\/njet.oops.jp\/wordpress\/?p=2875"},"modified":"2013-01-27T16:18:52","modified_gmt":"2013-01-27T07:18:52","slug":"%e3%82%bb%e3%83%b3%e3%82%bf%e3%83%bc%e8%a9%a6%e9%a8%93%e3%83%bb%e6%95%b0%e5%ad%a6ia-%e7%ac%ac3%e5%95%8f","status":"publish","type":"post","link":"https:\/\/njet.oops.jp\/wordpress\/2013\/01\/22\/%e3%82%bb%e3%83%b3%e3%82%bf%e3%83%bc%e8%a9%a6%e9%a8%93%e3%83%bb%e6%95%b0%e5%ad%a6ia-%e7%ac%ac3%e5%95%8f\/","title":{"rendered":"\u30bb\u30f3\u30bf\u30fc\u8a66\u9a13\u30fb\u6570\u5b66IA \u7b2c3\u554f"},"content":{"rendered":"<p>twitter\u306eTL\u3067\u4eca\u5e74\u306e\u30bb\u30f3\u30bf\u30fc\u8a66\u9a13\u30fb\u6570\u5b66IA\u304c\u96e3\u3057\u304f\u306a\u3063\u3066\u308b\uff0c\u50be\u5411\u304c\u4eca\u307e\u3067\u3068\u9055\u3046\uff0c\u7b49\u3005\u3042\u3063\u305f\u306e\u3067\uff0c\u691c\u7d22\u3057\u3066\u554f\u984c\u3092DL\u3057\u3066\u307f\u305f\u3002\u3044\u307e\u307e\u3067\u306e\u30bb\u30f3\u30bf\u30fc\u306e\u554f\u984c\u3068\u304b\u307b\u3068\u3093\u3069\u898b\u305f\u3053\u3068\u306a\u3044\u306e\u3067\uff0c\u3069\u3053\u304c\u3069\u3046\u9055\u3046\u306e\u304b\u306f\u5206\u304b\u3089\u306a\u3044\u3082\u306e\u306e\uff0c\u7b2c3\u554f\u306e\u5e7e\u4f55\u304c\u3061\u3087\u3063\u3068\u9762\u767d\u305d\u3046\u3060\u3063\u305f\u306e\u3067\uff0c\u56f3\u3092\u63cf\u3044\u3066\u307f\u305f\u3002<\/p>\n<p><a href=\"http:\/\/www.flickr.com\/photos\/sukarabe\/8404007955\/\" title=\"2013\u30bb\u30f3\u30bf\u30fc\u8a66\u9a13\u30fb\u6570\u5b66IA\u7b2c3\u554f(\u5168\u90e8\u5165\u308a) by sukarabe, on Flickr\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/farm9.staticflickr.com\/8052\/8404007955_6f0131dbe9_z.jpg\" width=\"640\" height=\"619\" alt=\"2013\u30bb\u30f3\u30bf\u30fc\u8a66\u9a13\u30fb\u6570\u5b66IA\u7b2c3\u554f(\u5168\u90e8\u5165\u308a)\"\/><\/a><\/p>\n<p>\u56f3\u304c\u63cf\u3044\u3066\u3042\u308c\u3070\u6613\u3057\u3044\u554f\u984c\u3060\u3068\u601d\u3046\u3002\u6587\u7ae0\u3092\u3061\u3083\u3093\u3068\u8aad\u3093\u3067\uff0c\u6b63\u3057\u3044\u56f3\u3092\u63cf\u304f\u3053\u3068\u304c\u5b58\u5916\u96e3\u3057\u3044\u3068\u3044\u3046\u3053\u3068\u306a\u306e\u3067\u3042\u308d\u3046\u3002<\/p>\n<p>$\\angle PAO=\\theta$ \u3068\u304a\u3051\u3070\uff0c$\\tan\\theta=\\frac{1}{3}$\u3067\u3042\u308b\u304b\u3089\uff0c$\\tan 2\\theta=\\frac{3}{4}$ \u3068\u306a\u308b\u3002\u3088\u3063\u3066\uff0c\u4e09\u89d2\u5f62ABC\u306f3\u8fba\u306e\u9577\u3055\u306e\u6bd4\u304c$3:4:5$\u306e\u76f4\u89d2\u4e09\u89d2\u5f62\u3067\u3042\u308b\u3002$AB=6$\u3067\u3042\u308b\u304b\u3089\uff0c$AC=\\frac{24}{5}$ \u3068\u306a\u308b\u3002<\/p>\n<p>\u4e09\u89d2\u5f62ABC\u306e\u5185\u63a5\u5186\u306e\u534a\u5f84$r$\u306f\uff0c\u3053\u306e\u5834\u5408\u306f\u76f4\u89d2\u4e09\u89d2\u5f62\u3067\u3042\u308b\u304b\u3089\uff0c\u6b21\u306e\u3088\u3046\u306b\u76f8\u4f3c\u3092\u5229\u7528\u3057\u3066\u7c21\u5358\u306b\u6c42\u3081\u3089\u308c\u308b\u3002<br \/>\n\\[ AN:NC=AN:NQ=AD:DP=3:1 \\]<br \/>\n\u3067\u3042\u308b\u304b\u3089\uff0c<br \/>\n\\[ r=\\frac{1}{4}AC=\\frac{6}{5} \\]<br \/>\n\u3053\u308c\u304b\u3089\uff0c\u4e09\u89d2\u5f62ADP\u3068\u4e09\u89d2\u5f62ANQ\u306e\u76f8\u4f3c\u6bd4\u306f$5:6$\u3068\u5206\u304b\u308b\u304b\u3089\uff0c<br \/>\n\\[ PQ=\\frac{1}{5}AP=\\frac{\\sqrt{10}}{5} \\]<\/p>\n<p>\u306a\u304a\uff0c\u56f3\u7248\u306f asymptote \u3067\u63cf\u3044\u305f\u3002\u5099\u5fd8\u9332\u7684\u306b\u30bd\u30fc\u30b9\u3092\u66f8\u3044\u3066\u304a\u304f\u3002<\/p>\n<pre lang=\"c\" line=\"1\">\r\nimport fontsize;\r\n\r\ndefaultpen(fontsize(11));\r\ndotfactor=6;\r\n\/\/pen dashed=linetype(\"6 6\");\r\n\/\/ pen dashed=linetype(\"3 3\");\r\npen dashed=linetype(\"4 4\");\r\npen thick=linewidth(0.6bp); \/\/ \u592a\u7dda\u7528\u306e\u30da\u30f3\u3092\u5b9a\u7fa9\u3059\u308b\u3002\r\npen hairline=linewidth(0.3pt);\r\n\r\ndefaultpen(linewidth(0.4bp)); \/\/ \u7dda\u306e\u592a\u3055\u30920.4\u30dd\u30a4\u30f3\u30c8\u306b\u8a2d\u5b9a\r\n\r\n\/\/ usepackage(\"amsmath\");\r\nusepackage(\"MinionPro\");\r\n\r\nimport geometry;\r\n\r\n\/* 2\u70b9A, B\u3092\u7d50\u3076\u5f27 *\/\r\npath ConnectTwo(pair A, pair B, real OffSet) {\r\n  pair M=(A+B)\/2+OffSet*unit(B-A)*I;\r\n  return A..M..B;\r\n}\r\n\r\n\r\nsize(8cm,0);\r\n\r\npoint pO=(0,0), pP=(0,1);\r\ncircle cO=circle(pO,3), cP=circle(pP,1);\r\n\r\nline T1=tangent(cP,pO-pP);\r\npoint[] pAB=intersectionpoints(T1,cO);\r\npoint pA=pAB[0], pB=pAB[1];\r\n\r\nline tgs[]=tangents(cP,pA);\r\nline T2=tgs[1];\r\npoint pD=intersectionpoints(T2,cP)[0];\r\npoint pC=intersectionpoints(T2,cO)[1];\r\n\r\npoint pE=2*pO-pC;\r\n\r\ncircle icABC=incircle(pA,pB,pC);\r\ncircle icCEA=incircle(pC,pE,pA);\r\npoint pQ=icABC.C, pR=icCEA.C;\r\n\r\npoint pT1=intersectionpoints(icABC,pA--pC)[0];\r\npoint pT2=intersectionpoints(icABC,pB--pC)[0];\r\n\r\npoint pM=intersectionpoints(pA--pP,pO--pD)[0];\r\n\r\n\r\nreal dist=0.15;\r\ndraw(Label(scale(0.9)*\"\\kern -0.5em\\raise 1ex\\hbox{$\\frac{24}{5}-r$}\", align=Center,filltype=UnFill), ConnectTwo(pA,pT1,3.7dist), hairline+dashed);\r\n\r\ndraw(Label(scale(0.9)*\"$3$\", align=Center,filltype=UnFill), ConnectTwo(pA,pD,1.5dist), hairline+dashed);\r\ndraw(Label(scale(0.9)*\"$3$\", align=Center,filltype=UnFill), ConnectTwo(pA,pO,-1.2dist), hairline+dashed);\r\ndraw(Label(scale(0.9)*\"$3$\", align=Center,filltype=UnFill), ConnectTwo(pO,pB,-1.2dist), hairline+dashed);\r\ndraw(Label(scale(0.9)*\"$1$\", align=Center,filltype=UnFill), ConnectTwo(pD,pP,dist), hairline+dashed);\r\ndraw(Label(scale(0.9)*\"$1$\", align=Center,filltype=UnFill), ConnectTwo(pO,pP,-dist), hairline+dashed);\r\ndraw(Label(scale(0.9)*\"$r$\", align=Center,filltype=UnFill), ConnectTwo(pT1,pQ,dist), hairline+dashed);\r\ndraw(Label(scale(0.9)*\"$r$\", align=Center,filltype=UnFill), ConnectTwo(pT1,pC,dist), hairline+dashed);\r\n\r\n\r\ndraw(cO);\r\ndraw(cP);\r\ndot(\"A\",pA, dir(pO--pA));\r\ndot(\"B\",pB,dir(pO--pB));\r\ndot(\"O\",pO,dir(pD--pP));\r\ndot(\"D\",pD,0.7dir(pQ--pD));\r\ndot(\"C\",pC,dir(pO--pC));\r\ndot(\"P\",pP,dir(pO--pQ));\r\ndot(\"E\",pE,dir(pO--pE));\r\ndot(\"Q\",pQ,dir(pP--pO));\r\ndot(\"R\",pR,dir(pP--pO));\r\ndot(\"N\",pT1,dir(pQ--pT1));\r\ndot(pT2);\r\n\r\ndraw(pP--pO);\r\ndraw(pP--pD);\r\ndraw(pA--pB);\r\ndraw(pA--pC--pB);\r\ndraw(pC--pE--pA);\r\ndraw(icABC);\r\ndraw(icCEA);\r\ndraw(pQ--pT1);\r\ndraw(pQ--pT2);\r\n\r\ndraw(pO--pD,dashed);\r\ndraw(pA--pQ,dashed);\r\n\r\ndot(\"M\",pM,N);\r\n\r\nmarkrightangle(pP,pO,pA,1.5mm);\r\nmarkrightangle(pA,pD,pP,1.5mm);\r\nmarkrightangle(pA,pC,pB,1.5mm);\r\nmarkrightangle(pE,pA,pC,1.5mm);\r\nmarkrightangle(pA,pM,pO,1.5mm);\r\nmarkrightangle(pA,pT1,pQ,1.5mm);\r\nmarkrightangle(pC,pT2,pQ,1.5mm);\r\n\r\nmarkangle(scale(0.9)*Label(\"$\\theta$\"),radius=8mm,n=2,space=0.6mm, pO,pA,pP);\r\nmarkangle(scale(0.9)*Label(\"$\\theta$\"),radius=8mm,n=2,space=0.6mm, pP,pA,pC);\r\n\r\naddMargins(2mm,2mm);\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>twitter\u306eTL\u3067\u4eca\u5e74\u306e\u30bb\u30f3\u30bf\u30fc\u8a66\u9a13\u30fb\u6570\u5b66IA\u304c\u96e3\u3057\u304f\u306a\u3063\u3066\u308b\uff0c\u50be\u5411\u304c\u4eca\u307e\u3067\u3068\u9055\u3046\uff0c\u7b49\u3005\u3042\u3063\u305f\u306e\u3067\uff0c\u691c\u7d22\u3057\u3066\u554f\u984c\u3092DL\u3057\u3066\u307f\u305f\u3002\u3044\u307e\u307e\u3067\u306e\u30bb\u30f3\u30bf\u30fc\u306e\u554f\u984c\u3068\u304b\u307b\u3068\u3093\u3069\u898b\u305f\u3053\u3068\u306a\u3044\u306e\u3067\uff0c\u3069\u3053\u304c\u3069\u3046\u9055\u3046\u306e\u304b\u306f\u5206\u304b\u3089\u306a\u3044\u3082\u306e [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[40,5],"tags":[],"class_list":["post-2875","post","type-post","status-publish","format-standard","hentry","category-asymptote","category-5"],"_links":{"self":[{"href":"https:\/\/njet.oops.jp\/wordpress\/wp-json\/wp\/v2\/posts\/2875","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/njet.oops.jp\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/njet.oops.jp\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/njet.oops.jp\/wordpress\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/njet.oops.jp\/wordpress\/wp-json\/wp\/v2\/comments?post=2875"}],"version-history":[{"count":14,"href":"https:\/\/njet.oops.jp\/wordpress\/wp-json\/wp\/v2\/posts\/2875\/revisions"}],"predecessor-version":[{"id":2894,"href":"https:\/\/njet.oops.jp\/wordpress\/wp-json\/wp\/v2\/posts\/2875\/revisions\/2894"}],"wp:attachment":[{"href":"https:\/\/njet.oops.jp\/wordpress\/wp-json\/wp\/v2\/media?parent=2875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/njet.oops.jp\/wordpress\/wp-json\/wp\/v2\/categories?post=2875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/njet.oops.jp\/wordpress\/wp-json\/wp\/v2\/tags?post=2875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}