If points p and q are contained in a plane then p and q is entirely contained in that plane?

If points p and q are contained in a plane, then the line segment connecting p and q also lies entirely within that plane. In Euclidean geometry, any two points define a straight line, and since both points are in the same plane, the entire line segment joining them must also be contained in that plane. Therefore, it is accurate to say that points p and q, along with all points between them, are entirely contained in the plane.