→ wichanm :作圖題 05/05 21:42
→ Honor1984 :你好歹也要把圖中的圖形相對位置講一下吧?兩圓有無相 05/05 21:47
→ Honor1984 :交?P在哪個位置 光有文字 圖沒有講 根本不清不楚 05/05 21:47
→ wichanm :不好意思圖已補 05/05 22:22
Two circles with centers O_1 and O_2,respectively,and a point P are given.
Consider a circle with center X(not known)such that the line through
the points A and B,which are the points of tengency(of each of the given
circles with the unknown circle),contains the point P.
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