Question

fill in the sentence below with the description that most specifically applies to the quadrilateral below. opposite sides are congruent all sides are congruent it is equiangular both pairs of sides are parallel

Explanation:

The quadrilateral has four right angles (all angles equal, so it is equiangular), opposite sides congruent, and both pairs of sides parallel. However, the most specific trait that distinguishes it as a rectangle (and not a square, since sides are 19 and 12, not all congruent) is that it is equiangular, which directly defines a rectangle in quadrilaterals (equiangular quadrilateral with four right angles, opposite sides congruent).

Answer:

it is equiangular