Practice problem
Is a square an isosceles trapezoid? Why or why not?
No because it doesn't have a parallel pair of sides.
No because it doesn't have a pair of congruent consecutive interior angles.
Yes because its opposite angles are congruent, with angle size 90∘.90^{\circ}.90∘.
Yes because its opposite sides are parallel and its adjacent angles are congruent.
Type a concept, like “slope” or “photosynthesis”.
