Polygons and Quadrilaterals

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Across
  1. 3. an angle smaller than 90°(no space)
  2. 4. “nona” means nine; has 9 sides and 9 angles
  3. 6. a shape where all sides and angles are equal (no space)
  4. 11. a triangle with 2 equal sides (no space)
  5. 14. a triangle in which all 3 sides are equal (no space)
  6. 16. a shape with 3 sides and 3 angles
  7. 18. a word meaning many
  8. 19. this polygon has congruent sides and angels
  9. 20. has 2 pairs of congruent sides but no parallel lines
  10. 21. 2 sets of parallel sides, 4 congruent sides, and opposite angles congruent
Down
  1. 1. means same or equal
  2. 2. a triangle with no equal sides (no space)
  3. 5. “deca” means ten; has 10 sides and 10 angles
  4. 7. an angle larger than 90°(no space)
  5. 8. a shape with 5 sides and 5 angles
  6. 9. an angle of exactly 90° (no space)
  7. 10. a shape with 6 sides and 6 angles
  8. 12. a polygon with exactly 4 sides
  9. 13. 2 sets of parallel sides with opposite sides congruent
  10. 15. 2 sets of parallel sides with opposite sides and angles congruent
  11. 17. Trapezoid one pair of parallel side with one pair of congruent sides