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Understanding Points, Lines, Segments, and Rays in Geometry

This lesson introduces essential concepts in geometry: points, lines, segments, and rays. A point is a specific location in space, represented by a letter like A or C. A line is a straight path made up of infinitely many points, denoted by two letters, such as line AB. A segment is a part of a line with two endpoints, such as segment CD. Lastly, a ray starts at an endpoint and extends infinitely in one direction, represented by points like K and J. Understanding these definitions is fundamental to mastering geometric relations.

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Understanding Points, Lines, Segments, and Rays in Geometry

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Presentation Transcript

  1. Points & Lines Lesson 16.1

  2. Math Vocabulary point – a location in space line – made up of many points and extends endlessly in both directions segment – part of a line; has two endpoints ray – part of a line; has one endpoint and extends endlessly in one direction

  3. Points & Lines Point… • can be any location in space • and is named or represented by a letter •А •C

  4. Points & Lines Line… • drawn with two arrows, one at each end • and is named by two letter points on the line • represented by the figure drawn above the letter name •B •A Line AB = AB

  5. Points & Lines Segment… • drawn with two endpoints, one at each end • and is named by the endpoints • represented by the figure drawn above the letter name •D •C Segment CD = CD

  6. Points & Lines Ray… • drawn with one endpoint and one arrow • and is named by two points on the ray • represented by the figure drawn above the letter name • when you name a ray, you name the endpoint first •K •J Ray KJ= KJ

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