Math Crossword Puzzle

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Across
  1. 2. number represents part of a whole number
  2. 5. number greater than one and has factors other then one and itself
  3. 9. whole number that can be positive, negative, or zero
  4. 11. The answer to a division problem
  5. 12. triangle with three equal sides
  6. 18. triangle with at least two equal sides
  7. 19. polygon with four sides
  8. 20. distance across a circle, passing through it's center
  9. 21. angle that measures exactly 90 degrees
Down
  1. 1. Triangle with no equal sides
  2. 3. quadrilateral with four right angles
  3. 4. angle measures less than 90 degrees
  4. 6. Angle measures more than 90 degrees, less than 180 degrees
  5. 7. lines or line segments that make a 90 degree angle
  6. 8. line segments never intersect and have same direction
  7. 10. amount of space occupied by a 3D object
  8. 13. quadrilateral with four equal sides and angles
  9. 14. number greater than one only divisible by one and itself
  10. 15. closed figure with straight sides and angles
  11. 16. Measure of an enclosed figure
  12. 17. comparison of two quantities