# What is the intersection of two planes?

A plane in geometry is a flat surface that extends into infinity in all directions.

## Answer: The intersection of two planes is always a straight line.

Let us find the intersection of two planes

**Explanation:**

Intersecting planes are the planes that are no parallel, and they always intersect in a line

The two planes cannot intersect in more than one line.

The above figure shows the two planes, P and Q intersect in a single line XY.

Therefore, the line XY is the common line between planes P and Q.

The two connecting walls, the binding edge of a book where all the papers(planes) meet are a real-life example of intersecting planes.