Proposed Geometry Problem 4: College Geometry, SAT Prep. Elearning, Online math tutor

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Problem 4. Triangle, Quadrilateral, Angles. Level: High School, SAT Prep, College geometry

In the figure, AD = CD = BC, and angle C = 2(angle A). Prove that x = 120° - angle A. See also Problem 42.
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Geometry Problem 4. Triangle, Quadrilateral, Angle. Elearning

Hints:
Key theorems
Triangle congruence

Last updated: July 15, 2008