Basic Geometry Terminology

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Across
  1. 6. Two angles that add together to equal 180°.
  2. 10. Two angles that together form a line.
  3. 14. A flat figure that has to be closed with sides.
  4. 18. A point, line, or plane cuts a segment into equal parts.
  5. 20. The unit of measure for an angle.
  6. 21. The zero value of a protractor.
  7. 23. A point, line, or plane that divides into two equal parts.
  8. 24. An angle that measures 90°.
  9. 25. The name for the shared endpoint of an angle.
  10. 27. Two angles that add together to equal 90°.
  11. 28. A dot that does not actually have any size.
  12. 29. Points that lie on the same line.
  13. 30. Two angles opposite across the vertex.
  14. 31. Points that do not lie in the same line.
Down
  1. 1. An angle that measures less than 90°.
  2. 2. On the same plane.
  3. 3. Points that stop a line from continuing on.
  4. 4. The figure with two rays with the same endpoint.
  5. 5. A line with arrowheads on each side.
  6. 7. used to measure angles.
  7. 8. A ray that divides an angle into two equal parts.
  8. 9. Two lines that will never cross.
  9. 11. Two intersecting lines that create four 90° angles.
  10. 12. A grid used to plot points.
  11. 13. A line with endpoints on each side.
  12. 15. To have the same measure.
  13. 16. Two angles that share a ray, or common side.
  14. 17. Two lines that cross.
  15. 19. A point that lies between two enpoints.
  16. 22. The point that is in the exact middle.
  17. 24. A line with one endpoint and one arrowhead.
  18. 26. An angle that is greater than 90° and less than 180°.