If an isosceles trapezoid has a base angle that measures 45 degrees, what are the other three angle measures?

Answer 1

isosceles means the base angles are equal
... and the upper angles are also equal

the sum of the interior angles of a quadrilateral is 360º

Answer 2

oh so does that mean that you would then subtract 45 + 45 ( 90 ) from 360, which would be 270, then divide that by 2 which is 135 so the three angles are 135, 45, and 135?