Polygon Crossword

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Across
  1. 2. any three sided shape
  2. 4. quadrilateral with all equal sides and four right angles
  3. 7. ten sided shape
  4. 9. triangle with one ninety degree angle
  5. 10. triangle with all three angles less than ninety degrees
  6. 12. six sided shape
  7. 14. distance around a shape
  8. 15. quadrilateral with exactly one pair of parallel sides
  9. 16. triangle with two equal sides
  10. 18. quadrilateral shape with four right angles
  11. 19. nine sided shape
  12. 20. triangle with one obtuse angle
Down
  1. 1. quadrilateral with two pairs of adjacent equal sides
  2. 3. quadrilateral with two sets of parallel sides
  3. 5. any four sided shape
  4. 6. five-sided shape
  5. 8. triangle with all three sides equal in length
  6. 11. quadrilateral with four equal sides
  7. 13. seven sided shape
  8. 17. triangle with no sides equal in length