Crossword piZone 2013

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Across
  1. 2. A plane shape bounded by a continuous line that is always the same distance from the center
  2. 3. The relation between two or more values
  3. 6. The study of numbers, patterns, space, and change
  4. 8. Formed by taking 2 circles, putting one above the other, and wrapping a surface around to connect the edges
  5. 12. Ratio of the circumference of a circle to its diameter π = C/d
  6. 13. Half the diameter of a circle r = d /2 r = C/2π
  7. 14. The straight line passing from one side of the circle to the other
Down
  1. 1. A decimal number whose number goes on forever without repeating
  2. 4. A three dimensional circle
  3. 5. The distance around a circle (perimeter) C = π d
  4. 7. The size of a surface a = π r2
  5. 9. Like fractions because they count part of something
  6. 10. A way to count part of something
  7. 11. The amount of space inside of something like a sphere