Spatial figures

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Across
  1. 1. is a six-dimensional figure having two equal parallel sides
  2. 5. a six-dimensional figure with equal sides
  3. 6. is a prism with bases bounded by simple closed curves usually circles
Down
  1. 2. is a figure with curve surface and circular base
  2. 3. is a space figure in which one face is called the base, and the other faces, called lateral faces, are triangles having a common vertex called the apex
  3. 4. is a solid all points of which are equidistant from some given point