SOLID FIGURE

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Across
  1. 1. is a solid shape defined on a 3-dimensional plane with two identical shapes facing each other.
  2. 3. is a solid shape defined on a three-dimensional plane. It holds two parallel bases, circular in shape, joined by a curved surface(like a tube), at a fixed distance.
Down
  1. 1. is a solid shape or a polyhedron with a polygon base and all lateral faces are triangles.
  2. 2. is a solid shape, absolutely round in shape, defined in three-dimensional space. Every point on the surface is equidistant from the center.
  3. 3. is a distinctive solid shape defined in a three-dimensional space. It has a flat surface and a curved surface, pointing towards the top.