Geometry Vocabulary

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Across
  1. 3. if not p, then not q
  2. 6. angle that measures exactly 180°
  3. 8. if p,then q
  4. 9. if not q, then not p
  5. 12. angles that share a common vertex and side
  6. 13. flat surface, extends forever in all directions
  7. 15. series of points extends forever in 2 directions
  8. 17. angles that add up to 90°
  9. 19. angles that are opposite and congruent
  10. 20. angle that measures exactly 90°
Down
  1. 1. if q, then p
  2. 2. the middle,halfway point of a line or segment
  3. 4. 2 endpoints, part of a line
  4. 5. angle that measures less than 90°
  5. 7. location, no size
  6. 10. angle that measures greater than 90°
  7. 11. angles that add up to 180°
  8. 14. points that lie on the same line
  9. 16. points that lie on the same plane
  10. 18. 1 endpoint, extends forever in the opposite direction