Geometric Reasoning Vocabulary

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Across
  1. 2. angles that add up to 90 degrees
  2. 4. an angle that is exactly 180 degrees
  3. 5. an angle that is exactly 90 degrees
  4. 6. an angle that is larger than 90 degrees but smaller than 180 degrees
  5. 7. usually labelled with a capital letter
  6. 10. angles that add up to 180 degrees
  7. 12. ___________ opposite angles are formed when two lines intersect
  8. 13. a flat surface that extends indefinitely
  9. 16. where three or more lines intersect at the same point
  10. 17. points that all lie on a single line
  11. 19. when two lines meet at a right angle
  12. 20. part of a circle
Down
  1. 1. angles that are next to each other
  2. 3. part of a line that has two end points
  3. 5. an angle that is exactly 360 degrees
  4. 8. where two lines meet
  5. 9. an angle that is larger than 180 degrees but smaller than 360 degrees
  6. 11. a math tool used to measure angles
  7. 12. when two rays meet to form an angle
  8. 14. an angle bigger than 0 degrees but smaller than 90 degrees
  9. 15. the area that is formed when two rays meet; can be described as ______ ABC
  10. 18. part of a line with one end point and extends through another point