Question

The measures of an angle and its supplement differ by 40°. What are the measures of the angles? Hint: An angle and its supplement have degree measures whose sum is 180°

Answer 1

Let the two numbers be x and x + 40, then
x + x + 40 = 180
2x = 180 - 40 = 140
x = 140/2 = 70
Therefore, the measures of the two angles are 70° and 70 + 40 = 110°