Online Geometry, Theorems and Problems

Geometry Problem 1209: Triangle, Circle, Excircle, Excenter, Circumcircle, Congruence. Online High School, College.

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The figure shows a triangle ABC with the excircle E corresponding to AC. The circumcircle of triangle BCE cuts CA extended at D. Prove that BE = DE.
  

Geometry Problem 1209: Triangle, Circle, Excircle, Excenter, Circumcircle, Congruence.

See also:
Triangles
Circle
Excenter
Circumcircle
Congruence
 

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Last updated: Apr 16, 2016