Question

Angle QRS is a straight angle. The measure of ∠2 is 60° more than the measure of ∠1. What is the measure of ∠1?

60

120

90

40

Answer 1

60

Explanation:

⇒∠1+∠2=180 (1)

and

⇒∠2=60+∠1

so the upper eq (1) becomes

⇒∠1+60+∠1=180

⇒2∠1+60=180

⇒2∠1=180-60

⇒2∠1=120

dividing both side by 2

⇒∠1=60