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![Online Geometry Problems, High School, College](h_geometry_problem_910.jpg)
Online Geometry 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.
![Geometry classes: Problem 425](p425_quadrilateral_angle.gif)
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