Math

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Across
  1. 3. a parallelogram with four equal sides
  2. 7. a straight line from the center to the perimeter of a circle
  3. 9. a four-sided polygon
  4. 11. a line enclosing a plane area
  5. 12. a three-sided polygon
  6. 14. the length of a straight line through the center of a circle
Down
  1. 1. the length of the closed curve of a circle
  2. 2. the measurement of a 2D surface or shape
  3. 4. the length between two things
  4. 5. a quadrilateral with one pair of parallel sides
  5. 6. a plane curve with every point equidistant from the center
  6. 8. a polygon with four equal sides and four right angles
  7. 10. a parallelogram with four right angles
  8. 11. lines that do not intercept
  9. 13. a quadrilateral whose opposite sides are parallel and equal