What is a coplanar point?

Coplanar points are points that lie on the same plane. This means that they share a common flat surface and do not extend in a three-dimensional space. In other words, if you can draw a straight line between two points and it lies entirely within the same plane, then those points are coplanar. Coplanar points are often used in geometry and trigonometry to help define shapes and angles within a two-dimensional space. Having coplanar points can also help simplify calculations and make it easier to visualize relationships between different points.