2-D SHAPES PUZZLE

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Across
  1. 3. The group name for all four-sided shapes
  2. 5. A shape with seven sides
  3. 8. Another name for sides
  4. 9. A shape with 5 sides
  5. 10. A shape with 4 equal sides
  6. 11. Where two sides meet
Down
  1. 1. A shape with opposite sides equal in length
  2. 2. A shape with 3 sides
  3. 4. Another name for 2-D shapes
  4. 6. A Greek word meaning "many"
  5. 7. A shape with 6 sides