Question

Find the measure of the numbered angle.
m∠8 =

Answer 1

Answer:

∠ 8 = 140°

Step-by-step explanation:

∠ 8 and 40° are adjacent angles and supplementary ( sum to 180° ), then

∠ 8 = 180° - 40° = 140°

Answer 2

Answer:

m∠8 = 140°

Step-by-step explanation:

40 and angle 8 are supplementary angles

this means they add up to 180°

so, you can make the following equation:

40 + m∠8 = 180

subtract 40 from both sides of the equation

40 - 40 m∠8 = 180 - 40

m∠8 = 180 - 40

m∠8 = 140