0, since there are circles and ovals
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.
The shape with the most corners is a polygon called a "myriagon," which has 10,000 sides and 10,000 corners. In general, the number of corners in a polygon is equal to the number of sides. Therefore, a myriagon has the most corners compared to any other polygon.
Oxygen does not have any corners because it is a gas and does not have a physical shape with corners.
any ellipse (including any circle)
All plane figures except circles have corners, and even that is debatable that circles have an infinite number of corners. Corners are simply where the line tracing the perimeter of the shape changes direction. Without any corners, you would have not have a convex figure. You would have a line. ■
any hexagon has
A triangle. Also, any shape that has no corners, such as a circle or an ellipse.
Any pentagon has.
Spherical balls have no corners. The American football has 2 corners. A ball (of any shape) may be sewn together of polygons each of which has several corners (vertexes).
Any curved shape such as a circle, an ellipse, an oval, a wriggly line - as long as it does not have any corners.
There is no smallest number, in any base.
Any rectangle (including squares).