Question

Find the missing angle using the diagram below. The figure is a parallelogram.

(5x + 5)°
135
28
180
90
145

Answer 1

145°

Explanation:

35+(5x+5)° = 180° (opposite angles sum up to 180°)

35+5x+5 = 180

40+5x = 180

5x= 180- 40

5x = 140

x = 28

therefore, the missing angle = (5x+5)°

= (5×28+5)= 140+5= 145°