Maths puzzle

12345678910111213
Across
  1. 5. Closed shape having four sides
  2. 8. opposite sides equal and all angles 90 degrees
  3. 10. Traingle having none of the sides equal
  4. 11. Starting from the same point
  5. 12. Having none sides paralle but adjacent sides being equal
  6. 13. Polygon having ten sides
Down
  1. 1. Polygon having five sides
  2. 2. all sides equal and all angles 90 degrees
  3. 3. Triangle having all sides and angles equal
  4. 4. Triangle having two sides and base angles equal
  5. 6. Shapes having all four sides equal but angles are not 90 degrees
  6. 7. Having one pair of parallel sides
  7. 9. The shape having its opposite sides parallel