Lengths but no angles?

Geometry Level 5

If A C = B C , A C = D E = A E , A B = C D AC=BC, AC=DE=AE, AB=CD and A , B , E A, B, E and B , C , D B, C, D are collinear, find ∠ A C B \angle ACB .


The answer is 20.

Joel Tan by Joel Tan , 21, Singapore

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1 solution

Ahmad Saad
Nov 30, 2015

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