The graph on the top left shows 4 planes intersecting in a line. There is no limit to the number of planes that can intersect in a line. The minimum number of planes that can intersect in a line is two.

The graph on the top right shows 3 planes intersecting in a point. There is no limit to the number of planes that can intersect in a point. The minimum number of planes that can intersect in a point is three.

The graph on the bottom left shows 3 planes that are parallel to each other. There is no limit to the number of planes that can be parallel to each other. The minimum number of planes that can be parallel to each other is two.

The graph on the bottom right shows 3 planes that are parallel to each other with two other planes that intersect with each other and with the parallel planes. There are three line instersections between the vertical plane and the three parallel planes. There are three line instersections between the horizontal plane and the three parallel planes. There are three point intersections between the vertical plane and the horizontal plane and the three parallel planes. As before, a minimum of two planes are required for a line intersection and a minimum of three planes are required for a point intersection.