Math

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Across
  1. 4. a straight line from the center to the perimeter of a circle
  2. 6. a three-sided polygon
  3. 8. a plane curve with every point equidistant from the center
  4. 9. lines that will never intersect
  5. 12. space between two objects
  6. 13. a parallelogram with four right angles
  7. 14. the total length of a shapes boundary
  8. 15. extending toward the middle
Down
  1. 1. a polygon with four equal sides and four right angles
  2. 2. a quadrilateral with one pair of parallel sides
  3. 3. the length of the closed curve of a circle
  4. 5. a quadrilateral whose opposite sides are parallel and equal
  5. 7. a point where two or more curves, lines, or edges meet or intersect.
  6. 10. pace taken up by a flat (2-D) surface or shape of an object.
  7. 11. the length of a straight line through the center of a circle