1. 1-5 Postulates and Theorems Relating Points, Lines and Planes

2. Postulate
A line contains at least two points, a plane contains at least 3 points not all in one line; space contains at least four points not all in one plane.

3. Postulate
Through any two points there is exactly one line.

4. Postulate
Through any 3 points there is at least one plane, and through any three noncollinear points there is EXACTLY one plane.

6. Postulate
If two points are in a plane, then the line that contains the points is in the plane.

7. Postulate
If two planes intersect, then their intersection is a line.

8. A line contains at least two points, a plane contains at least 3 points not all in one line; space contains at least for points not all in one plane.
Through any two points there is exactly one line.
Through any 3 points there is at least one plane, and through any three noncollinear points there is EXACTLY one plane.
If two points are in a plane, then the line that contains the points is in the plane.
If two planes intersect, then their intersection is a line.

9. What is a theorem? Important statements that have been PROVEN TRUE.
From previous information

10. Theorem
If 2 lines intersect, then they intersect in exactly one point.

11. Theorem
Through a line and a point not in the line there is exactly one plane.

12. Theorem
If 2 lines intersect, then exactly one plane contains the lines.

13. Homework
Pg. 25 #s 5-17, 20
Pg #s 5-20