Math Help PLease!!!!

Question

Angle A and angle B are supplementary angles. if Angle A is 35 degrees, how big is angle B (Btw Angle B is just a straight line. Angle A is 35 degrees) Plz help me

Answer 1

The key here is to understand that supplementary angles sum to 180°. So:

∠mA + m∠B = 180°

35° + m∠B = 180°

Solve for the measure of angle B.

Answer 2

180 - 35 = 145 degrees for angle B

supplementary angles sum to 180

35 + 145 = 180