Question

(0.5 point) A trapezoid is isosceles if and only if its (base angles, legs) are congruent.

Answer 1

A trapezoid is isosceles if and only if its **base angles** are congruent. In an isosceles trapezoid, the non-parallel sides (legs) are equal in length, and the angles adjacent to each base are equal. Therefore, the correct statement is that an isosceles trapezoid has congruent base angles.