Visualizing Solid Shapes

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Across
  1. 3. A type of prism with 15 edges
  2. 5. A solid which has flat surfaces
  3. 6. A polygon with 6 sides
Down
  1. 1. A solid formed by stacking circles in a circular manner
  2. 2. A solid with only 1 vertex
  3. 4. Solid whose volume = pi x r^2 x h
  4. 5. Solid whose all faces are triangular except the base which is the shape of a polygon