3. name the plane that contains tn and qr.
refer to the figure.
4. how many planes are shown in the figure?
5. name three collinear points.
6. are points n, r, s, and w coplanar? explain.
7. name the intersection of plane xsr and plane stq
8. given two points, how many lines go through both points?
9. given three non-collinear points, how many planes contain all three points?