Question

which shape has perpendicular sides?

Explanation:

Step1: Recall perpendicular lines definition

Perpendicular lines intersect at a right angle ($90^{\circ}$).

Step2: Analyze each shape

• The pink parallelogram: Adjacent sides are not perpendicular.
• The blue rectangle: By definition, adjacent sides are perpendicular (all angles are $90^{\circ}$).
• The green and orange irregular shapes: Adjacent sides do not form right angles.

Answer:

The blue rectangle.