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# Geometry 1.2 Points. Lines and Planes

Geometry 1.2 Points. Lines and Planes. Points. Basic Unit of Geometry Has no size Named using capital letters Points are written as capital letters A, B, C. What Points Look Like. A. S. B. M. R. If we get a lot of points together and they are straight we make a line!. B. C. S.

## Geometry 1.2 Points. Lines and Planes

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1. Geometry 1.2Points. Lines and Planes

2. Points • Basic Unit of Geometry • Has no size • Named using capital letters • Points are written as capital letters A, B, C

3. What Points Look Like A S B M R

4. If we get a lot of points together and they are straight we make a line! B C S P M L

5. Lines • Are made of an infinite number of points • Extend in both directions FOREVER • Named by two points on the line • Or with a lowercase cursive letter • The name is written with a symbol AB SV KT

6. What Lines Look Like d S M G

7. Vocabulary • Collinear = • points on the same line • Noncollinear = • Not on the same line

8. Collinear/Noncollinear d S l H M Q G

9. Rays • Are lines that end on one side • Extend in one direction FOREVER • Named by the endpoint and one other point on the ray • The name is written with a symbol CB KM UV

10. What do rays look like V K M C U V X

11. Line Segment • The chunk of line between two points • Could be part of a line or ray or alone • Named by the endpoints • The name is written with a symbol BH DG PV

12. What do Line segments look like V K M C U V X

13. Plane • Flat surface • Extends FOREVER • Named by three points in the plane • Or by an uppercase cursive letter • The name is written like this ABC JKM R

14. More Vocabulary • Coplanar = • points on the same • Noncoplanar = • Not on the same plane plane

15. What do planes look like R V M K C U

16. 1.23-27

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