Collinear points lie on the same line, while coplanar points lie in the same plane. A point can be contained in multiple lines and planes. A line can be contained in multiple planes, but a plane does not have edges and can intersect another plane at a single line or point.
15. Alternative Plane Drawings Note that the intersection of two planes is a line. Therefore, segment AD stretches out to be a line. A real planes goes on for ever. The boundaries of the planes are only in the model.
16. Name the back plane. Name the left plane. Name the bottom plane. Name the top plane. Name the front plane. BCF CDE ABC ABG ADE
19. Point C is in plane _____ Point D is in plane _____ Point E is in plane _____ Point F is in plane _____ Point G is in plane _____ Point A is in plane _____ Point B is in plane _____ H R L H L L, R, H L, R, H
20. S W O T R Y X True or False Intersects plane M at point O. True #1
21. Plane M intersects at more than 1 point. S W O T R Y X True or False False #2
22. S W O T R Y X True or False T, O and R are collinear. False #3
23. S W O T R Y X True or False X, O, and Y are collinear. True #4
24. S W O T R Y X True or False R, O, S, and W are coplanar. True #5
25. S W O T R Y X True or False R, S, T, and X are coplanar. False #6
26. S W O T R Y X True or False R, X, O and Y are coplanar. True #7