So you would set angle y plus angle z equal to 90 degrees. 2b + 6 +3b - 1 = 90 5b + 5 = 90 5b = 85 b = 17 so for y 3(17)-1 = 50 degrees so for z 2(17) + 6 = 40 degrees angle y and w form a straight line equal to 180 degreew so w = 180 - 50 = 130 degrees which leaves x being 140 degrees
