Segments, Rays, Parallell Lines and Planes

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# Segments, Rays, Parallell Lines and Planes - PowerPoint PPT Presentation

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

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### Segments, Rays, Parallell Lines and Planes

1-3

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

Find a pair of parallel lines

• Skew Lines:
• Parallel planes:
• Where does plane ABD and plane EHD intersect?

Find three segments:

• Find three rays:
• Name the line in three ways:
• Name a pair of opposite rays:
Homework
• Pg 19 #5-7, 14-31, 55