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Online Math: Geometry Problem 1222: Doubling the Cube, Triangle, 90, 120 degrees, Perpendicular, Congruence. Tiled background image: Intihuatana, Machu Picchu. Level: College, High School.

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The figure below shows a triangle ABC with angle ACB = 120 degrees and angle ACD = 90 degrees (D on AB). If BD = AC, prove that Formula to prove.
 
 

Geometry Problem 1222: Doubling the cube, Triangle, 90, 120 degrees, Perpendicular, Congruence.
 
 

 

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Last updated: Jun 3, 2016