Geomorty question on trapezoids

Question

do all trapezoids have all pairs of consecutive angles suplementary?

 

does an issocles trapezoid have both pairs of oppposite angles congruent?

Answer 1

Not all of the consecutive angles are supplementary. Only those between the two parallel sides are supplementary. They are same-side-interiors.

 

In an isosceles trapezoid the base angle pairs are congruent.