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Fernando
Frequent VisitorJoined: 24 Jan 2004Posts: 34
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Posted: Sun Oct 31, 2004 6:21 am Post subject: 幾何證明題
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ABCD 是一個四邊形 外面畫一個圓 會碰到四個頂點 裡面劃一個圓 會碰到四個邊 AC和BD是對角線 相交於S EF 是大圓的直徑 和BD 垂直 交界於 M 證明 AS:SC = EM:MF
一個網友問我的,總覺得這題很簡單……..但畫出的圖跟證明的式子不合…….
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