segments rays parallell lines and planes n.
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Segments, Rays, Parallell Lines and Planes

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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.

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Presentation Transcript
definitions
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.
definitions1
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.
definitions2
Definitions
  • Skew lines- non coplanar lines which do not intersect.
  • Parallel planes- planes that never intersect
slide5

Find a pair of parallel lines

  • Skew Lines:
  • Parallel planes:
  • Where does plane ABD and plane EHD intersect?
slide6

Find three segments:

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