There are seven planes with the same distance from the four vertices of the space quadrilateral ABCD

There are seven planes with the same distance from the four vertices of the space quadrilateral ABCD

If the four vertices are not all on one side of the plane, then:
1. (1,3) type: one on one side of the plane, the other three on the other side of the plane
2. Type [(2,2)] means that each of the two planes has two vertices, so that the plane has [3]