Online Geometry Problems

Geometry Problem 85. Contact Triangles Areas, Incircle, Excircle, Contact Triangles. High School, College, Math Education

In the figure below, given a triangle ABC, S1 is the area of contact triangle of the incircle, Sa, Sb, and Sc are the areas of the contact triangles of the excircles. Prove that: Formula to proof.

Math problem about contact triangles, area, incircle, excircle



1. See Problems 82, 83, 84.


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