Monday, January 17, 2011

Problem 568: Triangle, Excircles, Tangency Point, Congruence

Geometry Problem
Click the figure below to see the complete problem 568.

 Problem 568: Triangle, Excircles, Tangency Point, Congruence.
Zoom at: Geometry Problem 568

1 comment:

  1. http://img10.imageshack.us/img10/6161/problem568.png

    BE and BD are external angle bisector of angle (ABC) ( see attached picture)
    So D,B,E are collinear and angle(DBF)= angle (GBE) ( half of vertical angles)
    So angle(FDB)=angle(BEG) ( complement angles to congruence angles)
    Triangles DHE is isosceles and DH=EH

    Peter Tran

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