Notes 1.2 Points, Lines, and Planes.pdf - Notes 1.2 Points...

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Notes: 1.2 Points, Lines, and Planes 3 Undefined Terms There are no formal definitions, only general ideas of what each term represents. 1. Point A point is represented by a dot. It has no dimensions. A or point A 2. Line An infinite set of points extending in opposite directions. 3. Plane A flat surface; must have at least 3 non-collinear points. Examples: 1. Name 3 points. B S R 2. Name a line 3 different ways. Line k 3. Name the plane 2 different ways. Plane T plane HBD 4. Name 3 points that do not lie in the plane. C D R A R B H C D S T k m A B Line AB Line m Q Plane Q A B C Plane ABC The dotted line means that the line is going through the plane and not lying in the plane.

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Vocabulary Words 4. Collinear Points (non-collinear) Points that lie on the same line. R, S, T are collinear R, S, U are non-collinear 5. Coplanar Points (non-coplanar) Points that lie in the same plane.
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