Visualising Solid Shapes

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Across
  1. 4. 3-D Shape with 12 edges
  2. 5. In a prism the lateral faces are ___.
  3. 6. ___ pyramid is made of a square base and 4 triangular faces.
  4. 7. Polygonal regions which make up solids
  5. 9. Solids made up of polygonal regions
Down
  1. 1. 3D objects have different views from different ___.
  2. 2. polyhedron with eight sides
  3. 3. arrangement of edge-joined polygons which can be folded to become a polyhedron.
  4. 5. shape with 2 circle faces and 1 curved surface
  5. 8. person who made the formula 'F + V = E +2'