Question

What is the value of the missing angle. A. 50 B. 60 C. 100 D. 240

Answer 1

The answer is b 60 degrees <span />

Answer 2

Interior angles of pentagon equals 540°. So if we add up all the angles, the result should be 540°. The upper angles are right angle so each of them is 90°

Put the numbers
∠1 + ∠2 + ∠3 + ∠4 + ∠5 = 540°
x + 150° + 150° + 90° + 90° = 540°
x + 480° = 540°
x = 540° - 480°
x = 60°

The answer is option b