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 Problem 142. Four Triangles, Incircle, Tangent and Parallel to Side, Areas.

In the figure below, given a triangle ABC and the incircle O (inscribed circle), DE, FG, and HM are tangent to the incircle O and  parallel to AC, AB, and BC respectively. If S, S1, S2, S3 are the areas of triangles ABC, AHM, BDE, and CFG respectively, prove that Area triangle formula. Post your comments or solutions in the blog.
 

Eearning 142: Four Triangles, Incircle, Areas

 

 

 

Four triangle, incircle, tangent, areas

 

 

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Last updated: July 24, 2008