Geometry measurement vocabulary

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Across
  1. 2. the collection of points equidistant from a single point
  2. 6. the distance across a circle
  3. 8. a mathematical equation used to calculate a measurement
  4. 10. a statement proven to be true by logic
  5. 11. the measure of distance around the outside of a circle
Down
  1. 1. a quadrilateral with one set of parallel sides
  2. 3. the measure of distance around the outside of a polygon
  3. 4. the measure of square units of space in a shape
  4. 5. a polygon with 3 sides and 3 angles
  5. 7. any shape made up of straight lines
  6. 9. a quadrilateral with 4 equal sides and 4 equal angles