Geometry Problems, Online Education

Problem 60. Isosceles triangle, Congruence, Angles. Level: High School, SAT Prep, College

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In the figure below, ABC is an isosceles triangle (AB = BC),  mABD = 30 degrees, mDBC = 10 degrees, and AC = BD. Prove that: mDCB = 20 degrees.

 



 
 

 

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