1 2 Points Lines And Planes Answer Key Geometry

Question: Point

Answer: Indicates a location and has no size.

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Question: Line

Answer: Represented by a straight path that extends in 2 opposite directions without the end.

Contains infinitely many points.

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Question: Plane

Answer: Represented by a flat surface that extends without end.

Contains infinitely many lines.

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Question: Collinear points

Answer: Points that lie on the same line.

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Question: Coplanar

Answer: Points and lines that lie in the same plan.

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Question: Space

Answer: The set of all points in 3D.

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Question: Segment

Answer: Is part of a line that consists of 2 endpoints and all points in between them.

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Question: Ray

Answer: Is part of a line that consists of 1 endpoint and all the points of the line on 1 side of the endpoint.

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Question: Opposite Rays

Answer: 2 rays that share the same endpoint and form a line.

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Question: Postulate or Axiom

Answer: An accepted statement of fact.

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Question: Intersection

Answer: The set of points the figures have in common.

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Question: Postulate 1-1

Answer: Through any 2 points there is exactly 1 line.

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Question: Postulate 1-2

Answer: If 2 distinct lines intersect, then they intersect in exactly 1 point.

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Question: Postulate 1-3

Answer: If 2 distinct planes intersect, then they intersect in exactly 1 line.

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Question: Postulate 1-4

Answer: Through any 3 non-collinear points is exactly 1 plane.

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