1) In concave equilateral pentagon ABCDE, Angle A is qual to Angle B is equal to 90 degrees. What is the degree measure of angle E?

2) Alex thinks 131 degrees are neat. What is the maximum number of interior angles of a convex n-gon that can have measure 131 degrees?

Guest Jan 18, 2018

#1**+2 **

1) In concave equilateral pentagon ABCDE, Angle A is qual to Angle B is equal to 90 degrees. What is the degree measure of angle E?

I believe we have something like this :

Angle A = B = 90° and the pentagon is equilateral

If we connected EC, triangle DEC is equilateral.....so angle DEC = 60°

And angle AEC = 90°

And angle AED = AEC - DEC = 90° - 60° = 30° = angle E

CPhill
Jan 18, 2018