1.2 Points, Lines, and Planes

# 1.2 Points, Lines, and Planes

## 1.2 Points, Lines, and Planes

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##### Presentation Transcript

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 ?

4. Vocab Terms:

5. Vocab Terms:

6. Or BA or line l Or plane ABC

7. 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?

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

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

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

11. Postulate 1-1

12. Postulate 1-2

13. Postulate 1-3

14. Postulate 1-4

15. You Know How?