1. 1.2 Points, Lines, and Planes
Objective: Understand and use the basic terms and postulates of geometry.

2. 1.2 Vocabulary Point Line Plane Collinear Points Coplanar Space
Segment
Ray
Opposite Rays
Postulate
Axiom
Intersection

3. Remember y = mx + b ?

5. Vocab Terms:

6. Vocab Terms:

7. Or BA or line l
Or plane ABC

8. Naming Points, Lines, and Planes
How can you tell that the label P is naming a plane instead of a point?
Why is plane RQS not a valid name for the plane?
What point(s) do lines l and m have in common?

9. Compare and Contrast
How is naming a ray similar to naming a line? How is it different?

10. Naming Segments and Rays
Can the three points shown on the line be used to name a plane? Explain.

11. Vocab Terms: Intersection: set of points the figures have in common
Postulate or axiom: an accepted statement of fact

12. Postulate 1-1

13. Postulate 1-2

14. Postulate 1-3

15. Postulate 1-4

16. You Know How?