** Definition of Intersecting Planes**

- The two planes that meet in a single line are called Intersecting Planes.

**More about Intersecting Planes**

- Two planes always intersect in a line as long as they are not parallel.
- Two planes cannot intersect in more than one line.

**Example of Intersecting Planes**

- In the above figure, the two planes A and B intersect in a single line
.*Kl*

Therefore, the lineis the common line between the planes A and B.*Kl*

**Solved Example on Intersecting Planes**

Identify the intersection between two planes.

Choices:

A. Plane A

B. Plane B

C. Line CD

D. None of these

Correct Answer: C

Solution:

Step 1:Two planes are said to be in intersection if they cross in a single line.

Step 2:Here, line CD intersects the plane A and plane B shown in figure.

Step 3:Therefore, line CD is the intersection between the two planes.

**Related Terms for Intersecting Planes**

- Intersection
- Line
- Plane