Problem 425: Quadrilateral, Triangle, Angles, 10, 20, 50 degrees, Congruence

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The figure shows a quadrilateral ABCD with angle ABD = 50 degrees, angle ACD = 20 degrees, angle BAC = 10 degrees, and AD = CD. Find the measure of angle CBD. Post a comment or solution.

 

Geometry classes: Problem 425
 
 

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Proposed Problem 424.
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