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由 hello 於 星期四 八月 28, 2003 7:06 pm
ABCD為四邊形使得AB=BC=CD=DA及∠ABC=60deg。設l為一過D而不與四邊形相切的直線，分別交AB及BC於E及F。設M為CE及AF的交點。證明CA2=CM*CE。
由 kevin 於 星期四 八月 28, 2003 11:28 am
誰幫翻譯一下
翻譯軟體這台沒有^^"
翻譯軟體這台沒有^^"
[分享]CA^2=CM*CE
由 yptsoi 於 星期四 八月 28, 2003 9:29 am
Let ABCD be a quadrilateral such that all sides have equal length and angle ABC is 60 deg. Let l be a line passing through D and not intersecting the quadrilateral (except at D). Let E and F be the points of intersection of l with AB and BC respectively. Let M be the point of intersection of CE and AF. Prove that CA2=CM*CE.
($3000)
($3000)