MATHEMATICS

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Across
  1. 3. ....... have six faces, which form a convex polyhedron.
  2. 5. shapes with sides that are all equal and interior (inside) angles that are all equal.
  3. 6. polygon with six sides
  4. 7. shape with no sides
Down
  1. 1. lines that don't intersect are called ........
  2. 2. only regular hexahedron
  3. 3. three-dimensional geometric shape that tapers smoothly from a flat base to a point called the apex or vertex.
  4. 4. polygon with three sides