1. SEGMENTS RAYS PARALLEL LINES PLANES

2. Vocabulary Segments part of a line made up of two endpoints and all the points between them this is line segment AB can be put together to make geometric figures AB

3. Rays Have a starting endpoint and then continue in one direction forever this is ray RT When two rays have the same endpoint we can create an angle R T

4. Opposite rays two collinear rays with the same endpoint ALWAYS form a straight line also referred to as a straight angle, has a degree measure of 180 AB C BA and BC are opposite rays

5. A B C Looking at this line name the 3 line segments AB BCAC Name the 4 rays AC or AB BC BA CB or CA AB and BA form a line are they opposite rays? No, they do not have the same endpoint

6. A D C E H B G B F Lines that do not intersect may or may not be coplanar Parallel lines coplanar AB EF Skew lines are lines that do not lie in the same plane AB and CG are skew

7. Parallel planes Planes that do NOT intersect Name 3 pairs of parallel planes AGHB DJIC GH I D A C B J Name a line that is parallel to AH Name a line that is parallel to plane CBHI JGHI ABCDAGJD CBHI DI AG