1.3 Segments, Rays, Parallel Lines, and Planes

1. 1.3 Segments, Rays, Parallel Lines, and Planes Chapter 1 Tools of Geometry Bellwork: pg 16 91 – 96 all pg 17 1 – 9 all

2. 1.3 Segments, Rays, Parallel Lines, and Planes Segment: part of a line consisting of two endpoints and all points between them Ray: part of a line consisting of one endpoint and all the points of the line in one direction Opposite rays: are two collinear rays with the same endpoint; always form a line

3. Naming Rays and Segments Name the segments and rays in the figure. Q P Segments: LP, LQ, PQ Rays: LP or LQ PQ and PL QP or QL L LP and PL form a line. Are they opposite rays? No, because they do not have the same endpoint.

4. Parallel Lines: Coplanar lines that do not intersect Skew Lines: Noncoplanar lines that do not intersect D Lines AB and EF are parallel. Line CG is skew to lines AB and EF. C A B G E F

5. D Parallel planes: Planes that do not intersect C Plane ABCD ll Plane EFGH A B H G E F *Look in book for examples 2 and 3 pages 18 and 19

6. Homework Workbook 1-3