Question

if points are on the same plane on a diagram... what does that look like?

Answer 1

It is a collection of coordinates on a 2 dimensional cartesian plane.
A point can have its posoition on the plane defined (x, y)

Answer 2

It would look like two dots on a table top, or on a window, except the plane continues without edges like the door and window have.

Answer 3

thanyou