# Finding ${DE, F A}.$ in Hexagon

Hexagon ABCDEF has a circumscribed circle and an inscribed circle. If $AB = 9$, $BC = 6$, $CD = 2$, and $EF = 4$. how to Find ${DE, F A}$?.

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Some of us consider it rude to present questions as commands. Others of us would like to know where the question came up, what work you've done on it, where you got stuck, and so on. –  Gerry Myerson Jun 23 '12 at 10:01
From Annual Harvard-MIT Mathematics Tournament,i know that it has something to do with "Brianchon’s Theorem" but i dont know how to to use that . –  Frank Jun 23 '12 at 11:40
There is a solution at question 8. –  Peter Phipps Jun 24 '12 at 22:42