Solids and Sets

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Across
  1. 5. pyramid 5 facez, 8 edges and 5 vertices
  2. 6. has four equal sides
  3. 7. based pyramid 5 faces, 8 edges and 5 vertices
  4. 12. 4 sides
  5. 13. 5 sides
  6. 14. corners of cube or cuboid
  7. 16. 6 faces, 12 edges and 8 vertices
  8. 17. 2 long sides 2 short sides
  9. 18. has 6 sides
  10. 20. 3 sides
Down
  1. 1. a plane shape bounded by straight lines
  2. 2. a cross section shape
  3. 3. prism 5 faces 9 edges and 6 vertices
  4. 4. a circular pyramid
  5. 8. 7 sides
  6. 9. a circular prism 3 faces 2 edges and 0 vertices
  7. 10. has one pair of parallel sides
  8. 11. 6 faces, 12 edges and 8 vertices
  9. 15. based pyramid 4 faces 6 edges 4 vertices
  10. 19. 8 sides