Question

The measure of an angle which is equal to its supplement is (a) 100° (b) 75° c) 90° (d) 60°​

Answer 1

Answer:

90°

Step-by-step explanation:

Let the angle measure be x°

x is equal to its supplement.

Let its supplement be y

x+y=180°

x+x=180

2x=180

x=90°