Use Ceva's Theorem to prove that the external bisectors of two angles of a triangle and the internal bisector of the third angle are concurrent.

(Headbang) Any hints on where to begin would be greatly appreciated.

Printable View

- Feb 7th 2011, 11:09 AMjpatrieUsing Ceva's Theorem for a proof about angle bisectors.
*Use Ceva's Theorem to prove that the external bisectors of two angles of a triangle and the internal bisector of the third angle are concurrent.*

(Headbang) Any hints on where to begin would be greatly appreciated. - Feb 11th 2011, 05:21 PMzzz123
I'm not sure but when you have two external angle bisectors, they intersect at a point which is the center of the excircles.

Excircles -- from Wolfram MathWorld

This might help you.