Crosswords

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Across
  1. 3. A quadrilateral with all sides of equal length and opposite angles equal
  2. 4. A quadrilateral with two pairs of adjacent sides equal; diagonals intersect at right angles
  3. 5. A quadrilateral with only one pair of parallel side
  4. 7. A quadrilateral with four equal sides and four right angles
  5. 10. A polygon with three sides and three angles
Down
  1. 1. A triangle with at least two sides of equal length
  2. 2. A triangle with all interior angles less than 90 degrees
  3. 6. A triangle with one angle greater than 90 degrees
  4. 8. A quadrilateral with opposite sides parallel and equal; all angles are right angles
  5. 9. A quadrilateral with opposite sides parallel and equal; angles are not necessarily right angles