geometry

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Across
  1. 6. a polygon with seven sides
  2. 9. the distance around the outside of a polygon
  3. 10. a polygon with twelve sides
  4. 12. a polygon with four sides
  5. 13. a polygon with three sides
  6. 14. a closed plane figure with three or more sides
  7. 15. a polygon with five sides
Down
  1. 1. a point that divides a segment into two congruent segments
  2. 2. a part of a line with endpoints
  3. 3. a line with one endpoint
  4. 4. a rule in geometry that requires no proof
  5. 5. a polygon with eight sides
  6. 7. a polygon with ten sides
  7. 8. a polygon with nine sides
  8. 11. a polygon with six sides