Ac1.2bCollinearIntersectionNamingPlanes
- 1. Co p lanar Points Collinear Points are points on the same line. are points that lie in the same plane.
- 2. Non-collinear p oints are points that do not lie on 1 line.
- 3. Non-co p lanar points are points that do not lie On 1 plane.
- 4. Point A is on line 1. Point A is in line 1. Line 1 contains point A. Line 1 is through point A.
- 5. The intersection of line 1 and line2 is point A. Intersection means the elements in both sets. Is the symbol for intersection.
- 6. Which is in? Which is thru? L 1 L 2
- 7. In? Under? Above? L 1 L 2 L 3
- 8. Which plane contains Point A ? Point B ? Point C ? Point D ? Line AB ? Both Both Both H V
- 9. Classroom Ex. P. 7 1-10
- 10. Classroom Ex. P. 7 11-20
- 11. Complete Shapes How many planes are drawn? Add Lines to complete the diagram. How many planes are drawn? 6
- 12. Complete 3-D diagrams Number of Planes = 7 Number of Planes = 8
- 13. Name the segment that go through point V. Name the rest of the Planes. VRS VWT VWR VST RST
- 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
- 17. Three planes can intersect at a 1 line.
- 18. Three planes can intersect at a 1 point.
- 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
- 27. S W O T R Y X Does a plane have edges? No #8
- 28. S W O T R Y X Can a given point be in 2 lines? Ten lines? Yes #9 Yes
- 29. S W O T R Y X Can a given line be in 2 planes? In 10 planes? Yes #10 Yes
- 30. Find the fourth point of the plane. A, B, C, ___ False #11-16 B, G, C, ___ B, E, F, ___ A, D, E, ___ D, C, H, ___ E, F, H, ___ D G G H A F
- 31. Are there any points in line CG besides C and G? Are there more than 4 points in plane ABCD? Yes Yes
- 32. Name the intersection of plane ABFE and BCGF. Name two planes that do not intersect. ABCD & DFGH ABFE & DCGH ADHE & BCGF
- 33. C’est fini. The End