Any point which is collinear with two other points on a plane also lies on that plane.
Example Solution: A, B, C, and D
Practice makes perfect
To name four points that are coplanar, we need to find a plane with at least four known points lying on it. Let's take a closer look at the figure and consider plane ABD.
Point C also lies on this plane. We know this because it is collinear with two other points from that plane — points A and B. This means that points A, B, C, and D are coplanar.
