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M217 Section 1.1. Points, Lines, and Planes (oh my!). Definitions. Definitions. Example 1. Name 3 collinear points Name 3 non-collinear points List two opposite rays Are and the same? List 3 coplanar points. Example 2. Name a point coplanar with J, K, L M, N, O

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m217 section 1 1

M217 Section 1.1

Points, Lines, and Planes (oh my!)

example 1
Example 1
  • Name 3 collinear points
  • Name 3 non-collinear points
  • List two opposite rays
  • Are and the same?
  • List 3 coplanar points
example 2
Example 2
  • Name a point coplanar with
    • J, K, L
    • M, N, O
    • J, Q
  • Where do segments JQ and QN intersect?
  • Where do planes JQN and MNO intersect?
point line and plane postulates
Point Line and Plane Postulates
  • A postulate is a statement that is accepted without proof.
  • Through any 2 pts there is exactly 1 line
  • Through any 3 noncollinear pts there is exactly one plane containing them
  • When two lines intersect, the intersection is a point
  • When two planes intersect, the intersection is a line
drawing planes
Drawing Planes
  • Plane G containing two lines that intersect at point J
  • Two planes that intersect at line SD
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