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Understanding Lines and Line Relationships

Learn about points, lines, line segments, rays, and the relationships between parallel lines, intersecting lines, and perpendicular lines. Discover how to identify these figures and their characteristics.

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Understanding Lines and Line Relationships

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  1. Lines Rina Iati Baresville Elementary SouthWestern School District

  2. Line A line goes on and on in both directions. A line is drawn with an arrow on each end

  3. This is called a point! When it’s at the end of a line it is called an endpoint!

  4. Line Segment A line segment is a part of a line. It is drawn with two endpoints

  5. Ray A ray goes on and on in one direction. It is drawn with an arrow on one end and an endpoint on the other.

  6. Line Relationships

  7. Parallel Lines Parallel lines are always the same distance apart. They will never touch. “Enemy Lines”

  8. Can you find the parallel lines?

  9. Intersecting Lines Intersecting lines are two lines that cross each other “Friends”

  10. Can you find the intersecting lines?

  11. 90 Perpendicular Lines Perpendicular lines are two lines that intersect to form right angles. “Married”

  12. Can you find the perpendicular lines?

  13. 90 Perpendicular lines are also intersecting lines because they cross each other. Perpendicular lines are a special kind of intersecting lines because they always form “perfect” right angles.

  14. Name each figure Point Line Ray Line Segment Perpendicular Intersecting Parallel

  15. Well Done!

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