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5 th Grade Geometry Lines & Angles

5 th Grade Geometry Lines & Angles. Lauri Hagie IDT 503 Final Project. Lines. Lines have arrows on each end. Lines do not end; they go on and on forever in both directions. Line Segments. Line segments may also be called segments. Line segments are part of a line.

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5 th Grade Geometry Lines & Angles

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  1. 5th Grade GeometryLines & Angles Lauri Hagie IDT 503 Final Project

  2. Lines • Lines have arrows on each end. • Lines do not end; they go on and on forever in both directions.

  3. Line Segments • Line segments may also be called segments. • Line segments are part of a line. • Line segments do not have arrows.

  4. Rays • Rays begin with a point at one end. • Rays go on and on forever in only one direction. • Rays have an arrow on one end.

  5. Horizontal • Lines, segments, and rays may be drawn horizontally. • Horizontal means level with the horizon. • The horizon is the line in the distance where the land and the sky meet. Horizontal Line Horizontal Segment Horizontal Rays

  6. Vertical Vertical Line • Lines, segments, and rays may be drawn vertically. • Vertical means straight up and down. Vertical Segment Vertical Rays

  7. Oblique Oblique Line Oblique Segment • Lines, segments, and rays may be oblique. • Oblique means slanted. Oblique Rays

  8. Parallel Parallel, Oblique Lines • Lines, segments, and rays may be parallel. • Parallel lines go in the same direction and will never cross over each other. • Parallel lines can be horizontal, vertical or oblique. Parallel, Horizontal Segments Parallel, Vertical Rays

  9. Intersecting Intersecting Lines • Lines, segments, and rays may cross over each other. • We call this intersecting. Intersecting Segments Intersecting Rays

  10. Perpendicular Perpendicular Lines • Lines, segments, and rays may be perpendicular. • When lines intersect and form square corners, we call them perpendicular. Perpendicular Segments Perpendicular Rays

  11. Angles • Angles form when lines, segments, or rays intersect. • There are 3 types of angles: • Acute • Right • Obtuse

  12. Right Angles • Right angles are 90 • They form square corners.

  13. Acute Angles • Acute angles are less than 90 • “A cute” little angle.

  14. Obtuse Angles • Obtuse angles are greater than 90

  15. Quiz Time! Name this figure: Line Segment Ray

  16. Correct! Way to go, You are right!

  17. Sorry… Your answer was not correct. Try again.

  18. Quiz Time! Name this figure: Horizontal Vertical Oblique

  19. Correct! Way to go, You are right!

  20. Sorry… Your answer was not correct. Try again.

  21. Quiz Time! Name this figure: Parallel Perpendicular

  22. Correct! Way to go, You are right!

  23. Sorry… Your answer was not correct. Try again.

  24. Quiz Time! Name this figure: Acute Right Obtuse

  25. Correct! Way to go, You are right!

  26. Sorry… Your answer was not correct. Try again.

  27. The End You are now a 5th grade expert in geometry! Hake, S., & Saxon, J. (2001) Math 65: an incremental development, 2nd edition. Norman, OK: Saxon Publishers, Inc.

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