Home Geometry Problems All problems Visual Index Problems Art Gallery 511-520 Double Angle Solution / comment        By Antonio Gutierrez

Problem 513: Triangle, Double Angle, Exterior Angle Bisector, Measure.
Level: High School, College, SAT Prep.

The drawing shows a triangle ABC with the exterior angle bisector BD. The angle A is double the angle C. Prove that AD=AB+BC.

Triangle, Double angle, exterior angle bisector

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