I know this because complementary means both angles equal 90 degrees so we know the angle A is 36 degrees so you subtract 36 from 90 and get 54, so angle B is 54 (i know this is right because i got a 100)
Sample Response: Complementary angles have a sum of 90°, so the sum of the measures of angles A and B is 90°. Subtract 36° from 90° and angle B has a measure of 54°.
