math cross word

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Across
  1. 2. 3.14159265439
  2. 3. how much a shape can hold
  3. 4. the inside of a shape
  4. 6. the number times itself times its self
  5. 9. the outside of a shape
  6. 10. a letter standing as a number
Down
  1. 1. the number times its self
  2. 2. the tool to mesure angles
  3. 5. 90 degrees
  4. 7. a number with factors 1 and x
  5. 8. the study shapes