Question

how many planes are shown in the figure?

Explanation:

Step1: Identify visible flat - surfaces

A plane is a flat, two - dimensional surface that extends infinitely. In the given figure, we can count the distinct flat - surfaces.

Step2: Count the planes

The planes are: plane $ABJH$, plane $BCFE$, plane $ADJF$, plane $CDJE$, plane $ACEG$. There are 5 planes.

Answer:

5