Question

<1 and <2 are supplementary angles . If m<1=77,then m<2=?

Answer 1

m∠2 = 103°

Explanation:

Since ∠1 and ∠2 are supplementary angles, together they equal 180. So, you would just subtract 180-77 and get 103. To check if you are correct just add ∠1 and ∠2 ( 77+103) and you'll get 180.

Answer 2

Explanation:

The sum of two supplementary angles sum up to 180°

Hence <1+<2 = 180°

Given

<1 = 77

Substitute and get <2

<1+<2 = 180

77+<2 = 180

<2 =180-77

<2 = 103°

Hence the measure of <2 is 103°