1. Segments, Rays, Parallel Lines and Planes
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Segments, Rays, Parallel Lines and Planes

2. OBJECTIVES
Identify segments and rays
Recognize parallel lines

3. VOCABULARY
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 points of the line on one side of the endpoint
Opposite rays- two collinear rays with the same endpoint
Parallel Lines- coplanar lines that do not intersect
Skew Lines- noncoplanar, not parallel and do not intersect
Parallel Planes- planes that do not intersect

4. Segment has two endpoints, named by endpoints with a bar over 𝐴𝐵 or 𝐵𝐴 Ray has one endpoint and goes on forever in the other direction, named by the endpoint and one other point on the ray 𝐴𝐵 Opposite Rays Two rays with the same endpoint. Opposite rays form a line

5. Skew Lines Lines that are NOT in the same plane Parallel Planes

6. Name the line 𝑾𝑿 , 𝑾𝒀 , 𝑾𝒁 , 𝑿𝑾 , 𝑿𝒀 , 𝑿𝒁 , 𝒀𝑾 , 𝒀𝑿 , 𝒀𝒁 , 𝒁𝑾 , 𝒁𝑿 , or 𝒁𝒀 Name all labeled segments 𝑾𝑿 , 𝑾𝒀 , 𝑾𝒁 , 𝑿𝒀 , 𝑿𝒁 , 𝒀𝒁 (can be written backwards) Name all labeled rays 𝑾𝒁 , 𝑿𝒁 , 𝒀𝒁 , 𝑿𝑾 , 𝒀𝑾 , 𝒁𝑾 Name all pairs of opposite rays 𝒀𝑾 and 𝒀𝒁 𝑿𝑾 and 𝑿𝒁

7. Name all segments shown that are parallel to 𝐴𝐸 𝑫𝑯 , 𝑪𝑮 , 𝑩𝑭 Name all segments shown that are skew to 𝑯𝑮 , 𝑫𝑪 , 𝑩𝑪 , 𝑭𝑮 why not 𝑪𝑮 ? Name the plane that is parallel to plane EHD plane BCG