1. Segments, Rays, Parallel Lines, and Planes Geometry Mrs. King Unit 1, Lesson 3

2. Definition Segment: the part of a line consisting of two endpoints and all points between them. P Q

3. Definition Ray: the part of a line consisting of one endpoint and all points on the line to one side of the endpoint. Q P

4. Definition Opposite rays: two collinear rays with the same endpoint. Q P R

5. Definition Parallel lines: coplanar lines that do not intersect. l m l || m

6. Definition Parallel planes: planes that do not intersect.

7. Homework Segments, Rays, Parallel Lines, and Planes in Student Practice Packet (Page 4, #1-17)