Pi day

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Across
  1. 2. formula for the area of a circle is (pi)(r)^(?)
  2. 6. pi this this type of number.
  3. 8. what is March 14th.
  4. 10. pi can be expressed as fraction this number is in the numerator.
  5. 11. pi is used to calculate this shape.
  6. 13. pi can be expressed as fraction this number is in the denominator.
  7. 14. pi comes from this language.
Down
  1. 1. the perimeter of the the circle.
  2. 3. the full length of the circle through the middle.
  3. 4. Does Mr. Vogel like the question "How many digits of pi do you know?"
  4. 5. the distance from the center of the circle to the edge.
  5. 7. circles are named by the...
  6. 9. the third digit of pi.
  7. 12. A turtle.
  8. 13. 3D circle.