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Online Geometry Problem 40: Triangle, Incenter, Excenter, 40, 60, 80 Degrees. High School, College, Mathematics Education

In triangle ABC, the angles A and B measure 80 and 40 respectively, I is the incenter and E the excenter. AB and CE meet at D. If BC = a, AC = b and CI = d, prove that .
 

Geometry problem 40, triangle, Incenter, Excenter
 


 

Sketch of problem 40

Sketch of Geometry Problem 40: Triangle, Incenter, Excenter, 40, 60, 80 Degrees, iPad Apps
 

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Last updated: Dec 6, 2017