Math crossword

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Across
  1. 2. A number that can be written as a ratio of 2 integers
  2. 6. a figure formed by two rays common end points
  3. 7. A closed figure formed by three or more line segments that do not cross
  4. 11. The distance around the circle
  5. 13. Interest that is applied to the initial amount only
  6. 15. A number that cannot be written as a ratio of 2 integers
  7. 17. The set of counting numbers
  8. 19. A number that can be expressed as the product of to equal integers
Down
  1. 1. The distance across the circle to the center
  2. 3. The set of counting numbers
  3. 4. A number that can be written as a ratio of 2 Integers
  4. 5. An angle with a measure of 90 degrees
  5. 7. The ratio of the circumference of a circle to its diameter
  6. 8. An angle with a measure between 0 and 90 degrees
  7. 9. To make less complicated, clearer, or easier
  8. 10. {..., -5, -4, -3, -2, -1, 0, 1, 2,...}
  9. 12. The distance from the outside of the circle to the center
  10. 14. The set of the rational and irrational numbers
  11. 16. A polygon with three sides
  12. 18. An angle with a measure greater than 90 and less the 180 degrees