Geometry Crossword Puzzle

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Across
  1. 3. An angle that is less than 90 degrees
  2. 4. Two angles that add to equal 180 degrees
  3. 9. 6 faced prism with 2 congruent bases
  4. 14. Lines that intersect to form 90 degree angles
  5. 16. The amount of material needed to cover a 3 dimensional shape
  6. 17. A 3 sided polygon
  7. 18. An angle that is greater than 90 degrees
  8. 20. The length in a circle that is double the radius
Down
  1. 1. Two angles that add to equal 90 degrees
  2. 2. A 5 sided polygon
  3. 5. A 90 degree angle
  4. 6. An 8 sided polygon
  5. 7. a line extending from the center of a circle to the edge of the circle
  6. 8. A continuous extent of length
  7. 10. Lines that never intersect
  8. 11. The amount of space occupied by a 3 dimensional figure
  9. 12. A 6 sided polygon
  10. 13. Any 4 sided polygon
  11. 15. A position in space
  12. 19. A rectangle with equal sides and angles