Home Geometry Problems All Problems 371-380 View or post a solution 
Problem 378. Triangle, Incenter, Parallel to a side, Angle, Congruence.
Level: High School, College, SAT Prep.

The figure shows a triangle ABC with the incenter I (point of intersection of all the internal angle bisectors). If line DIE is parallel to BC, prove that DE = BD + CE.

Triangle, Incenter, Parallel


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