Question 388921
Suppose the angles are 90, 90, x, x, and 2x-40, where x>90. The sum of the angles is 540 degrees, so


90 + 90 + x + x + (2x-40) = 540


4x + 140 = 540


x = 100


So, the fifth angle is 2(100) - 40 = 160 degrees.