Tic Tac Toe Crossword Math

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Across
  1. 3. a straight line passing through the center of a circle
  2. 5. The distance around the circle
  3. 7. A straight line from the center to circumference of a circle
  4. 8. The sixteenth letter of the Greek alphabet = 3.14....
  5. 10. A system of numbers and arithmetic based on the number ten
Down
  1. 1. The measure of the amount of space inside of a solid figure
  2. 2. A numerical quantity that is not a whole number
  3. 4. A whole number; a number that is not a fraction
  4. 6. number an integer or a fraction
  5. 9. relation between two amounts