1. Page 4

2. Line, segment and angle Postulates

3. Line and Segment Postulates Line – a line contains at least 2 points. Plane – contains at least 3 noncollinear points.

4. Line and Segment Postulates Intersecting planes- The intersection of 2 planes is a line.

5. Line and Segment Postulates Segment addition postulate – given 3 collinear points, AB+BC=AC ABC ABBCAC + =

6. Angle Postulates Angle addition postulate – if B is in the interior of angle AOC, then A O C B 20º 45º

7. Angle Postulates Linear pair postulate – if 2 angles form a linear pair, they are supplementary O A B 30º C B 150º O AC B 30º 150º O

8. Page 6

9. L N M

10. R T S

12. Page 7

13. W Y X

14. Page 8 Two angles are adjacent if they share a common vertex and common side, but have no interior points in common. They share a common vertex and common side, but have no interior points in common. They do not share a common vertex. They share a common vertex and common side, but have no interior points in common. They have interior points in common.

15. Page 8

17. Perpendicular Lines and Planes

18. Page 9 Perpendicular Lines and Planes

19. Page 8 Perpendicular Lines and Planes

20. Page 10 Perpendicular Lines and Planes

21. Page10 Perpendicular Lines and Planes

22. Page 10 Perpendicular Lines and Planes

23. Homework Page 8 #2-12 evens, 6 do only parts a,b,f