Polygon Puzzle Mania!

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Across
  1. 2. a quadrilateral with four equal and straight sides that form right angles
  2. 5. a quadrilateral with only one pair of parallel sides
  3. 6. an angle of 90°
  4. 7. a quadrilateral that has two pairs of parallel sides
  5. 8. a four-sided polygon
  6. 13. a triangle that has two sides equal in length
  7. 14. a polygon with six sides
  8. 15. an eight-sided polygon
Down
  1. 1. a five-sided polygon
  2. 3. a triangle that has no equal sides
  3. 4. a parallelogram that has all four sides equal in length
  4. 9. an angle that is less than 90°
  5. 10. a three-sided polygon
  6. 11. an angle that is more than 90° but less than 180°
  7. 12. a type of polygon with all sides equal in length and all equal angles