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\u5706\u5468\u89d2\u662f90\u5ea6\u8bf4\u660e\u4ec0\u4e48<\/p>\n
\u5706\u5468\u89d290\u5ea6\u8bf4\u660e\u8fd9\u4e2a90\u5ea6\u7684\u5706\u5468\u89d2\u6240\u5bf9\u5e94\u7684\u5706\u5fc3\u89d2\u662f180\u5ea6\uff0c\u6240\u5bf9\u5e94\u7684\u5706\u5f27\u4e5f\u662f180\u5ea6\uff0c\u8fd9\u4e2a\u5f27\u957f\u662f\u534a\u4e2a\u5706\u957f=\u03c0r\u3002\u4e5f\u8bf4\u660e\u8fd9\u4e2a\u5706\u5468\u89d2\u6240\u5bf9\u7684\u5f26\u662f\u76f4\u5f84\uff0c\u6240\u4ee5\u6709\u4e86\u76f4\u5f84\u5bf9\u5e94\u7684\u5706\u5468\u89d2\u662f90\u5ea6\u7684\u5b9a\u7406\u3002<\/p>\n
\u5706\u5fc3\u89d2\u7684\u5ea6\u6570\u600e\u4e48\u6c42<\/p>\n
L(\u5f27\u957f)=(r\/180)\u00d7\u03c0\u00d7n\uff08n\u4e3a\u5706\u5fc3\u89d2\u5ea6\u6570\uff09\u3002<\/p>\n
S(\u6247\u5f62\u9762\u79ef) = (n\/360)\u00d7\u03c0r2\u3002<\/p>\n
\u6247\u5f62\u5706\u5fc3\u89d2n=\uff08180L\uff09\/\uff08\u03c0r\uff09\uff08\u5ea6\uff09\u3002<\/p>\n
K=2Rsin(n\/2) K=\u5f26\u957f\uff1bn=\u5f26\u6240\u5bf9\u7684\u5706\u5fc3\u89d2\uff0c\u4ee5\u5ea6\u8ba1\u3002<\/p>\n
\u5706\u5fc3\u89d2\u7684\u5ea6\u6570\u6709\u8303\u56f4\u5417<\/p>\n
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