Question

the diagram below is a right rectangular prism. all the angles shown measure 90°. name two planes that are perpendicular. answer attempt 1 out of 2 and

Explanation:

Step1: Recall plane - perpendicularity in prism

In a right - rectangular prism, adjacent faces are perpendicular planes.

Step2: Name a pair of adjacent planes

Plane $PQRS$ and plane $QRUN$ are adjacent. Since all angles in the prism are $90^{\circ}$, these two planes are perpendicular.

Answer:

Plane $PQRS$, Plane $QRUN$ (Other valid pairs like Plane $PQRS$ and Plane $PTOU$, Plane $QRUN$ and Plane $RUNS$ etc. are also correct)