Planes that never intersect each other are known as Parallel Planes.

More About Parallel Planes

Planes which are not parallel are called intersecting planes and they always intersect in a line

Examples of Parallel Planes

The above figure shows two parallel planes, A and B.
The opposite walls of a room, floor and ceiling are the examples of parallel planes.

Video Examples: Parallel Planes and Lines

Solved Example on Parallel Planes

Ques: Identify the parallel planes.

Choices:

A. RST and UZY
B. SXY and RUT
C. WZU and XYT
D. STU and XYT

Correct Answer: C

Solution:

Step 1: Parallel planes are the planes that do not intersect.
Step 2: SXY and RUT are the planes that intersect. Hence, they are not parallel.
Step 3: RST and UZY are the planes that intersect. Hence, they are not parallel.
Step 4: STU and XYT are the planes that intersect. Hence, they are not parallel.
Step 5: WZU and XYT are the planes that do not intersect. Hence, they are parallel.