What is the intersection of two planes?
Answer: The intersection of two planes is always a straight line.
Let us find the intersection of two planes.
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.