1. Chapter 1 Exploring Geometry

2. 1.2 Points, Lines, and Planes

3. Drill Find the next number in the sequence: -3, -1, 1, 3, __, __
1, 4, 2, 5, 0, __, __
Name three things in the real world that represent a line, a point and an angle.

4. Notes(Vocab)
Points: have no size, often represented with dots, and named with a capital letter. C A B

5. Lines: have no thickness, and extend infinitely in two directions
Lines: have no thickness, and extend infinitely in two directions. Named with two points, or a cursive letter. l Y X

6. Collinear: points that are lying in the same line.
Non-Collinear: Not lying in the same line. A B C C A B

7. Planes: Extend infinitely in all directions
Planes: Extend infinitely in all directions. It is flat and has no thickness. There are two ways to name a plane.
Coplanar: Points and lines that are in the same Plane.

8. Postulates: an accepted statement or fact.
*The intersection of two lines is a ______ *The intersection of two planes is a ______ *Through any two points lies exactly one ______ *Through any three non-collinear points there is exactly one ______.
point
line
line
plane

9. A C B I D E H F G

11. Homework
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