Polygons

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Across
  1. 4. a quadrilateral with only one pair of parallel sides
  2. 5. a quadrilateral with four congruent sides
  3. 6. a quadrilateral with two pairs of parallel lines
  4. 7. a quadrilateral with four right angles and two pairs of congruent sides
  5. 9. a triangle with one obtuse angle
  6. 11. a quadrilateral with four congruent sides and four right angles
  7. 12. a five-sided polygon
Down
  1. 1. a six-sided polygon
  2. 2. a triangle with three acute angles
  3. 3. a four-sided polygon
  4. 8. a triangle with a right angle
  5. 10. a three-sided polygon