The 80-80-20 Triangle Problem, A Derivative, Solution #10

The 80-80-20 Triangle Problem, A Derivative, Solution #11

$ABC\;$ is an isosceles triangle with vertex angle $\angle BAC = 20^{\circ}\;$ and $AB = AC.\;$ Point $E\;$ is on $AB\;$ such that $AE = BC.\;$ Find the measure of $\angle AEC.$

Solution

This solution is by Silvia Doandes.

a problem in 80-80-20 triangle, solution by Silvia Doandes

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