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 Problem 6. Triangle,  Angles, Double-Angle, Congruence. Level: High School, SAT Prep, College geometry

In the figure, AB = CD, angle A = 2x, and angle BCD = 3x. Find x. Post a comment or solution. Try to use elementary geometry (Euclid's Elements.)
 

Geometry Problem: Congruence
 


Hints:
 Key theorems
 Triangle congruence

 

 

 
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