Shapes have sides. Do you mean, what shape has 6 sides or, what solid has 6 faces?
Since a cube has 6 faces, you would be looking for a solid shape with only 2 faces and no such solid exists.
Shape
A solid shape with 6 faces, yes. A plane shape with 6 sides is a hexagon.
triangular pyramid
There is no regular solid with 13 faces.
tetrahedron
a sphere
Depends. What shape is it?
A polyhedron (solid shape formed by plane faces) with four faces is called a tetrahedron.
the net of a shape is how many sides of a shapeThe net of a solid shape is a flat arrangement of its faces faces which can be folded together to make the solid shape. See related links, below.
A cube is a 3D shape that has 6 faces of equal area.