Can you suggest the shape of shadows?
It is similar to the object
The shape of the shadow depends on the shape of the object and on the orientation of the source of light with respect to the object. For example, the shadow of a cube can be rhombus, square, rectangle or no shadow at all depending on the orientation of source of light. In addition, the size will depend upon the distance of object and source of light, size of object and size of source.