Question

Which of the following is not true of an isosceles trapezoid?

A. Each pair of base angles is congruent.

B. Its legs are congruent.

C. Its diagonals are congruent.

D. An angle is supplementary to both of its consecutive angles.

Answer 1

Is C the correct answer?

Answer 2

the diagonals are congruent.

choice D is says
An angle is supplementary to both of its consecutive angles.

that is saying an angle plus its neighbor angle add to 180

that is true for one of its neighbor angles, but not for *both*