Go Geometry Problems: Excenter

Online Geometry Problem 707: Triangle, Excenters, Angle Bisectors, Angle, Measurement. Level: High School, Honors Geometry, College, Mathematics Education

The figure shows a triangle ABC, AD meets BC at F and AE meets BC at G. D is the excenter of triangle ABG corresponding to BG and E is the excenter of triangle AFC corresponding to FC. If angle ADE + angle AED = 142 degrees, find angle ADB + angle AEC.

Triangle, Excenters, Angles, Problem

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