Visualising solid shapes puzzle 2

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Across
  1. 1. Solids are made up of polygonal regions which are
  2. 4. If all diagonals lie on or inside the polyhedron,it is called
  3. 6. The edges meet at points called
  4. 8. A hexagonal prism has a____as its base.
  5. 10. faces meet at line segments called
Down
  1. 2. This formula is true for polyhedrons.
  2. 3. solids made up of polygonal regions are called
  3. 5. is a polyhedron whose base is a polygon and whose lateral faces are triangles with common vertex.
  4. 7. a prism or pyramid is named after its
  5. 9. EULER’S FORMULA