What is coplanar and how it works ?

Question

detail please

Answer 1

When you say two things are coplanar, you mean they are in the same plane

Answer 2

"Coplanar" means "in the same plane". It is usually used to describe four or more points or two or more lines to show that they are all in one plane.

Four or more points do not have to be in the same plane. The same is true of two or more lines.