Question

1. a parallelogram with four right angles is... // un paralelogramo con cuatro ángulos rectos es,...

Explanation:

Step1: Recall parallelogram properties

A parallelogram has opposite sides parallel and equal.

Step2: Recall right angle implications

A quadrilateral with four right angles is a rectangle (by definition: a rectangle is a parallelogram with four right angles). Also, if it has equal sides, it's a square, but the general term for a parallelogram with four right angles is a rectangle (and square is a special case of rectangle).

Answer:

A parallelogram with four right angles is a rectangle (or a square, which is a special type of rectangle).