# What is the intersection of two planes?

**Solution:**

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

Intersecting planes are planes that are not parallel, and they always intersect in a line.

The two planes cannot intersect at 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 is a real-life example of intersecting planes.

Thus, the intersection of two planes is always a straight line.

## What is the intersection of two planes?

**Summary:**

The intersection of two planes is always a straight line.

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