Carston's polygon crossword

12345678910
Across
  1. 1. has two sets of parallel sides
  2. 3. triangle has a triangle with three acute angles
  3. 5. triangle has a triangle with one right angle
  4. 6. has one set of parallel opposite sides
  5. 7. has six sides
  6. 10. has two sets of parallel sides, all sides have equal length
Down
  1. 2. has two sets of opposite parallel lines that are the same length
  2. 4. has equal adjacent sides and one pair of congruent opposite angles
  3. 8. has eight sides and no right angles
  4. 9. has four right angles and four sides