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Introduction to Geometry: Points, Lines, and Planes

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## Introduction to Geometry: Points, Lines, and Planes

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**Basic Geometric Figures**• Point: Location in space represented by a dot and a capital letter. • Points have no size, only position. • Example:**Basic Geometric Figures**• Line: Connected series of points that extends in both directions without end (represented by arrows). • Lines can be named by any two points on the line, or by one lowercase letter.**Basic Geometric Figures**• Plane: Infinite set of points forming a flat surface extending in all directions, represented by a four-sided figure. • Example:**Basic Geometric Figures**• Segment: Part of a line bounded by two endpoints.**Basic Geometric Figures**• Ray: Part of a line that starts at a certain (end)point and continues forever in one direction.**Naming Geometric Figures**• Intersection: The point shared by two crossing figures.**Naming Geometric Figures**• Parallel: Two lines in the same plane that never intersect. • Represented by symbol “||” (line 1 || line2)**Naming Geometric Figures**• Skew: Two or more lines that do not lie in the same plane. They are not parallel and do not intersect.**Real Life Example**E • Find four segments that intersect AC. • Find three segments || to AC. • Find four segments skew to AC. A F B FedEx G C H D