Zero, it has one point only.
A crescent has two [curved] sides and two corners.
4 faces and 2 vertices.
The answer is zero. A 2D shape has no volume.
Oh, dude, a triangle has zero square corners! I mean, it's called a triangle for a reason, right? Like, if it had square corners, it would be a square or a rectangle or something. But nope, triangles are all about those three angles and three sides, no squares in sight!
a cylinder
One face, zero vertices (corners), zero edges.
Your question is inconsistent on its face. You asked "What shape has zero faces . . . . . and has only one face." I'd say that nothing could ever meet both of those requirements. They are ... how you say ... 'mutually exclusive'.
A cylinder has zero corners.
zero
Zero.
zero
A water bottle typically has two edges (the top and bottom rims) and zero corners (rounded edges). A cone has one edge (the curved surface) and one corner (the pointed tip).
Zero corners and edges, and a cyllindar has two faces.
A coroner is an official who leads investigations into deaths in violent or suspicious conditions. It is not clear that there are any particular shapes that reduce their numbers.If you meant corners, then in 2-dimensional space is any closed curve such as a circle, an ellipse, an oval or even an irregular shape have zero corners. These shapes have their 3 dimensional counterparts, also with no corners.
A sphere has no edges or edges but its face is globular.
Zero