Geometry Problem 109. Angle, Right Triangle, Cevian, 45 Degrees, Mobile
Apps, iPad, iPhone. Level: School, College, Mathematics Education

In the figure below, given a
right triangle ABC, BD is a cevian to AC, AB = CD, angle ABD = a
, and angle A = 2a. Prove that
x = 45º.
Art of Geometry Problem 109 using Mobile Apps. Circle
Patterns.
Art of Geometry Problem 109 in Motion. Circle patterns
Click on the figure below.


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