In the figure , AB and DE are diameters. DE and chord BC are perpendicular to each other and intersect at F.
我已證明三角形OFC全等於三角形OFB
prove that 弧邊(2AE)=弧邊(BDC)
圖片參考:http://img220.imageshack.us/img220/7785/34898989.png
收錄日期: 2021-04-19 23:29:38
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101026000010KK05994