3 D shapes

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Across
  1. 1. A flat surface of 3D shapes.
  2. 3. A corner where atleast 2 edges are meeting.
  3. 5. 3D shape with 12 edges equal in length, and have 8 vertex, and 6 Faces.
Down
  1. 2. 3D shape which do not have edge, vertices and has curve surface.
  2. 4. A line segment between 2 faces of 3D shapes.