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Problem 507. Triangle, Interior Point, 120 Degrees, Congruence, Angle.
Level: High School, College, SAT Prep.

The drawing shows a triangle ABC with BD = AC. Angle ADB is 120 degrees, angle CAD = 2a, and angle ADC = 90 + a. Find the measure of the angle BCD.

Triangle, 120 degrees, Congruence, Angles


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