QUADRILATERALS

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Across
  1. 5. a quadrilateral with opposites sides parallel and congruent
  2. 6. - polygon with 4 sides
  3. 7. parallelogram with all angles measuring 90 degrees
  4. 10. - a quadrilateral with no pair of parallel sides
Down
  1. 1. two angles that add up to 180 degrees
  2. 2. refers to sides or angles that have the same measure
  3. 3. a quadrilateral with exactly one pair of parallel sides
  4. 4. a quadrilateral with all sides equal in length and all angles measuring 90 degrees
  5. 8. refers to sides or angles of a quadrilateral that are not adjacent but are across from each other
  6. 9. a quadrilateral with two distinct pairs of adjacent sides that are equal
  7. 11. a parallelogram with all sides equal in length