None, they have vertices.
it has 0 curved edges
A rectangle has no curved faces; it has four straight edges and four right angles. It is a polygon with a flat, two-dimensional shape. If you are referring to a three-dimensional shape like a rectangular prism, it still does not have any curved faces, as all its faces are rectangular.
4 edges A rectangle has four edges. A rectangle has 4 sides but no edges which are normally applicable to polyhedrons.
A cylinder has two curved edges, which are the edges where the curved surface meets the two circular bases. In addition to these curved edges, a cylinder also has two flat circular faces but no sharp edges.
A triangle has three edges; a rectangle has four.
If the figure has curved edges, then it's not a "rectangle".
no because a polygon can not have curved edges,points,sides,ect.
it has 0 curved edges
it has 0 curved edges
There are no curved edges, but it does stack.
there are no curved edges on any triangle.
There are no curved edges on a triangular pyramid.
A rectangle has no curved faces; it has four straight edges and four right angles. It is a polygon with a flat, two-dimensional shape. If you are referring to a three-dimensional shape like a rectangular prism, it still does not have any curved faces, as all its faces are rectangular.
4 edges A rectangle has four edges. A rectangle has 4 sides but no edges which are normally applicable to polyhedrons.
A 2D rectangle has no edges but has 4 boundaries, and a 3D rectangle is a rectangular prism and has 12 edges.
In 3 dimensions, at least, a cube has no curved edges.
There are no curved edges in a pentagon. Part of the definition of any polygon is that they have straight edges.