1. Segments, Rays, Parallell Lines and Planes
1-3

2. Definitions
Segment- a segment is a part of a line which contains two endpoints and all of the points between.
Ray- A ray is a part of a line consisting of only one endpoint, and extending infinitely in the opposite direction.

3. Definitions
Opposite rays- Two collinear rays with the same endpoint. Opposite rays always form a line.
Parallel lines- two coplanar lines that do not intersect.

4. Definitions Skew lines- non coplanar lines which do not intersect.
Parallel planes- planes that never intersect

5. Find a pair of parallel lines
Skew Lines:
Parallel planes:
Where does plane ABD and plane EHD intersect?

6. Name the line in three ways:
Find three segments:
Find three rays:
Name the line in three ways:
Name a pair of opposite rays:

7. Homework
Pg 19 #5-7, 14-31, 55