Section 1.2 Points, Lines, and Planes Undefined Terms.

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Presentation transcript:

Section 1.2 Points, Lines, and Planes

Undefined Terms

Point Represents “location”; represented with a dot; no shape or size; 0-dimensional

Line Represents “straightness”; represented with a straight line with two arrowheads; 1-dimensional

Plane Represents “flatness”; represented with a shape that looks like a tabletop; 2-dimensional plane P or plane ABC

Other Definitions

Collinear Points on the same line.

Coplanar Points Points on the same plane.

Line Segment A portion of a line.

Ray Consists of an initial point and extends in one direction to infinity.

Intersection The point(s) two geometric figures have in common

Example Draw 3 non-collinear points.

Example Sketch the intersection of a plane and a line..

Homework pg 13 # even, 49, even