可證HBFO四點共圓(此圓的直徑為AO,即大圓半徑)角HOF固定,故HF是常數,即H在AO上任意滑動,HF不變,H滑到A點時,HF與AE重合。
回複:小學生數學題 15
所有跟帖:
• 高。四點公園,角AOE=角HBF;HF=R*sin(<HBF)=R*sin(<AOE)=AE -longsky- ♂ (0 bytes) () 11/07/2013 postreply 19:10:15
可證HBFO四點共圓(此圓的直徑為AO,即大圓半徑)角HOF固定,故HF是常數,即H在AO上任意滑動,HF不變,H滑到A點時,HF與AE重合。
• 高。四點公園,角AOE=角HBF;HF=R*sin(<HBF)=R*sin(<AOE)=AE -longsky- ♂ (0 bytes) () 11/07/2013 postreply 19:10:15
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