Question

Angle 3 and angle 4 are supplementary angles. Angle 3 is 88°. What is the measure of angle 4?

Answer 1

Supplementary angles add to 180
they are x and y

x is 88
what is y
x+y=180
88+y=180
minus 88 from both sides
y=92

angle 4 is 92 degrees

Answer 2

Since a supplementary angle equals 180 degrees then all you have to do to figure out the second angle is subtract 180-88 to find Angle 4 which is 92.