Machu Picchu. Math teacher Master Degree.
 Problem 60. Isosceles triangle and angles.
Level: High School, SAT Prep, College

 Hints:
 Triangle Congruence

 

 

In the figure below, ABC is an isosceles triangle (AB = BC),  mÐABD = 30º, mÐDBC = 10º, and AC = BD. Prove that: mÐDCB = 20º. Post your solutions or ideas in the blog.

 


 

 

 

 

 

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Last updated: June 24, 2008

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