{"id":98,"date":"2022-05-12T12:40:27","date_gmt":"2022-05-12T04:40:27","guid":{"rendered":"https:\/\/www.daixiaomao.com\/bkw\/?p=98"},"modified":"2022-05-28T19:57:34","modified_gmt":"2022-05-28T11:57:34","slug":"bkwxkyt","status":"publish","type":"post","link":"https:\/\/www.daixiaomao.com\/bkw\/98.html","title":{"rendered":"\u5706\u53f0"},"content":{"rendered":"\n

\u258c<\/mark><\/strong>\u7b80\u4ecb<\/strong><\/p>\n\n\n\n

\u5706\u53f0\uff0c\u662f\u6307\u7528\u4e00\u4e2a\u5e73\u884c\u4e8e\u5706\u9525\u5e95\u9762\u7684\u5e73\u9762\u53bb\u622a\u5706\u9525\u540e\uff0c\u5e95\u9762\u4e0e\u622a\u9762\u4e4b\u95f4\u7684\u90e8\u5206\u3002<\/p>\n\n\n\n

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\u4e2d\u6587\u540d<\/strong><\/td>\u5706\u53f0<\/td>\u4f53\u79ef\u516c\u5f0f<\/strong><\/td>V=1\/3\u03c0h(r\u00b2\uff0bR\u00b2\uff0brR)<\/td><\/tr>
\u5916\u6587\u540d<\/strong><\/td>Frustum of a cone<\/td>\u4fa7\u9762\u79ef\u516c\u5f0f<\/strong><\/td>S\u4fa7=\u03c0l(R+r)<\/td><\/tr>
\u5e94\u7528\u5b66\u79d1<\/strong><\/td>\u6570\u5b66\u51e0\u4f55<\/td>\u8868\u9762\u79ef\u516c\u5f0f<\/strong><\/td>S\u8868=\u03c0r\u00b2+\u03c0R\u00b2+\u03c0Rl+\u03c0rl=\u03c0(r\u00b2+R\u00b2+Rl+rl)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u258c<\/mark><\/strong>\u5b9a\u4e49<\/strong><\/p>\n\n\n\n

\u7528\u4e00\u4e2a\u5e73\u884c\u4e8e\u5706\u9525\u5e95\u9762\u7684\u5e73\u9762\u53bb\u622a\u5706\u9525\uff0c\u5e95\u9762\u4e0e\u622a\u9762\u4e4b\u95f4\u7684\u90e8\u5206\u53eb\u505a\u5706\u53f0\u3002<\/p>\n\n\n\n

\u258c<\/mark><\/strong>\u6027\u8d28<\/strong><\/p>\n\n\n\n

1.\u5e73\u884c\u4e8e\u5e95\u9762\u7684\u622a\u9762\u662f\u5706\u3002<\/p>\n\n\n\n

2.\u8fc7\u8f74\u7684\u622a\u9762\u662f\u7b49\u8170\u68af\u5f62\u3002<\/p>\n\n\n\n

3.\u540c\u522b\u7684\u68f1\u53f0\u4e00\u6837\uff0c\u82e5\u5b83\u662f\u4e00\u4e2a\u5706\u9525\u4f53\u5728\u00bd\u5904\u622a\u65ad\uff0c\u5219\u4e0a\u5e95\u534a\u5f84\u4e5f\u5e94\u4e3a\u4e0b\u5e95\u76841\/2\uff0c\u622a\u4e0b\u9762\u79ef\u662f\u6574\u4e2a\u5706\u9525\u9762\u79ef\u76841\/7.\u8fc7\u5706\u53f0\u4fa7\u9762\u4e00\u70b9\u6709\u4e14\u53ea\u6709\u4e00\u6761\u6bcd\u7ebf\u3002<\/p>\n\n\n\n

4.\u5982\u679c\u6cbf\u4e00\u4e2a\u76f4\u89d2\u68af\u5f62\u5782\u76f4\u4e8e\u5e95\u8fb9\u7684\u8170\u65cb\u8f6c\u4e00\u5468\uff0c\u5c06\u5f97\u5230\u4e00\u4e2a\u5706\u53f0\u3002<\/p>\n\n\n\n

5.\u5706\u53f0\u4efb\u610f\u4e24\u6761\u6bcd\u7ebf\u5ef6\u957f\u540e\u4ea4\u4e8e\u4e00\u70b9\u3002<\/p>\n\n\n\n

\u258c<\/mark>\u516c\u5f0f<\/strong><\/p>\n\n\n\n

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\u5706\u53f0\u7684\u8868\u9762\u79ef\u516c\u5f0f\uff1aS=\u03c0r\u00b2+\u03c0R\u00b2+\u03c0Rl+\u03c0rl=\u03c0(r\u00b2+R\u00b2+Rl+rl)<\/p>\n\n\n\n

r-\u4e0a\u5e95\u534a\u5f84\u3001R-\u4e0b\u5e95\u534a\u5f84\u3001h-\u9ad8\u3001l-\u6bcd\u7ebf=\u6839\u53f7\u4e0b[(R-r)\u00b2+h\u00b2]<\/p>\n\n\n\n

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1\/2(S1+S2)\u7684\u4e00\u4e2a\u5706\u67f1\u4f53\u4e58\u4ee5\u9ad8h\uff0c\u5373<\/p>\n\n\n\n

\u5706\u53f0\u4fa7\u9762\u79ef:\u03c0l(R+r)<\/p>\n\n\n\n

\u516c\u5f0f\u63cf\u8ff0\uff1a<\/p>\n\n\n\n

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\u258c<\/mark>\u76f4\u89c2\u56fe<\/strong><\/p>\n\n\n\n

\u5706\u53f0\u7684\u4e0a\u3001\u4e0b\u5e95\u9762\u90fd\u662f\u5706\uff0c\u5706\u7684\u76f4\u89c2\u56fe\uff0c\u4e00\u822c\u4e0d\u7528\u659c\u4e8c\u4fa7\u753b\u6cd5\uff0c\u800c\u7528\u6b63\u7b49\u6d4b\u753b\u6cd5\u3002\u5b83\u7684\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n

(1)\u5728\u5df2\u77e5\u56fe\u5f62\u5706O\u4e2d\u53d6\u4e92\u76f8\u5782\u76f4\u7684\u8f74Ox,Oy\u3002\u753b\u76f4\u89c2\u56fe\u65f6\uff0c\u628a\u5b83\u4eec\u753b\u6210\u5bf9\u5e94\u7684\u8f74O’x’,O’y’,\u4f7f\u2220x’O’y’=120\u00b0(\u621660\u00b0)\uff0c\u5b83\u4eec\u786e\u5b9a\u7684\u5e73\u9762\u8868\u793a\u6c34\u5e73\u5e73\u9762\uff1b<\/p>\n\n\n\n

(2)\u5df2\u77e5\u56fe\u5f62\u4e0a\u5e73\u884c\u4e8ex\u8f74\u6216y\u8f74\u7684\u7ebf\u6bb5\uff0c\u5728\u76f4\u89c2\u56fe\u4e2d\uff0c\u5206\u522b\u753b\u6210\u5e73\u884c\u4e8ex’\u8f74\u6216y’\u8f74\u7684\u7ebf\u6bb5\uff1b<\/p>\n\n\n\n

(3)\u5e73\u884c\u4e8ex\u8f74\u7684\u76f4\u7ebf\u957f\u5ea6\u4e0d\u53d8,\u5e73\u884c\u4e8ey\u8f74\u7684\u76f4\u7ebf\u957f\u5ea6\u53d8\u4e3a2\u5206\u4e4b\u4e00\u3002<\/p>\n\n\n\n

\u5706\u53f0\u7684\u4e0a\u3001\u4e0b\u5e95\u9762\u90fd\u662f\u5706\uff0c\u5706\u7684\u76f4\u89c2\u56fe\uff0c\u4e00\u822c\u4e0d\u7528\u659c\u4e8c\u4fa7\u753b\u6cd5\uff0c\u800c\u7528\u6b63\u7b49\u6d4b\u753b\u6cd5\u3002\u5b83\u7684\u89c4\u5219\u662f\uff1a<\/p>\n\n\n\n

(1)\u5728\u5df2\u77e5\u56fe\u5f62\u5706O\u4e2d\u53d6\u4e92\u76f8\u5782\u76f4\u7684\u8f74Ox,Oy\u3002\u753b\u76f4\u89c2\u56fe\u65f6\uff0c\u628a\u5b83\u4eec\u753b\u6210\u5bf9\u5e94\u7684\u8f74O’x’,O’y’,\u4f7f\u2220x’O’y’=120\u00b0(<\/p>\n\n\n\n

60\u00b0)\uff0c\u5b83\u4eec\u786e\u5b9a\u7684\u5e73\u9762\u8868\u793a\u6c34\u5e73\u5e73\u9762\uff1b<\/p>\n\n\n\n

(2)\u5df2\u77e5\u56fe\u5f62\u4e0a\u5e73\u884c\u4e8ex\u8f74\u6216y\u8f74\u7684\u7ebf\u6bb5\uff0c\u5728\u76f4\u89c2\u56fe\u4e2d\uff0c\u5206\u522b\u753b\u6210\u5e73\u884c\u4e8ex’\u8f74\u6216y’\u8f74\u7684\u7ebf\u6bb5\uff1b<\/p>\n\n\n\n

(3)\u5e73\u884c\u4e8ex\u8f74\u7684\u76f4\u7ebf\u957f\u5ea6\u4e0d\u53d8,\u5e73\u884c\u4e8ey\u8f74\u7684\u76f4\u7ebf\u957f\u5ea6\u53d8\u4e3a2\u5206\u4e4b\u4e00\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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