Online Geometry Problems

Online Geometry Problem 1079: Convex Quadrilateral, Isosceles Triangle, Diagonals, Double Angle. Level: High School, SAT Prep, College, Mathematics Education

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The figure below shows a convex quadrilateral ABCD with AB = BD and angle ABD = 2.angle ACD. Prove that BC = AB.
Try to use elementary geometry (no trigonometry).
See also: Problem 1079 in motion

Geometry problem 1079: Quadrilateral, Isosceles Triangle, Diagonals, Double Angle
 


 

 

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Last updated: Feb 7, 2015