有沒有好辦法？

來源: 於 2009-03-06 16:27:56 [舊帖] [給我悄悄話] 本文已被閱讀：次

A quatrilateral that has consecutive sides of lengths 70, 90, 130, 110 is inscribed in a circle and also has a circle inscribed in it. The point of tangency of the inscribed circle to the side of length 130 divides that side into segments of lengths x and y. Find |x-y|.

ASHME 1990 problem 28.

Thanks in advance!