Question

the diagram below is a right rectangular prism. all the angles shown measure 90°. name two planes that are perpendicular.

Explanation:

Step1: Recall perpendicular - planes definition

In a right - rectangular prism, two planes are perpendicular if the angle between them is 90°.

Step2: Identify perpendicular planes

For example, plane ABCD and plane ABFE are perpendicular because the edges where they meet (AB) form right - angles between the two planes.

Answer:

Plane ABCD and plane ABFE