A circle!
what will be the shape of indifference curve if one of the two goods is a free commodity
A cylinder has two circular faces.
a circle
a cylinder has two faces that are circles
The shape of a cylinder has two flat faces and a circular body
I believe it is a cone, a cylinder has three faces.
A Bézier curve is a parametric curve defiend by a set of control points, two of which are the ends of the curve, and the others determine its shape.
There is no such shape - unless there are other faces. If there is one rectangular face then you require at least four other faces - one on each edge of the rectangle - making a minimum of 5 faces.
That's impossible. A shape has three or more sides/faces. There is NO shape that has one or two sides/faces
a cylinder
a two dimensional one