it has 0 curved edges
No, it can't, for curved edges you use a piercing saw!
how many curved side does a cube have
No, all 6 edges of a hexagon are straight
Circle
it has 0 curved edges
it has 0 curved edges
If the figure has curved edges, then it's not a "rectangle".
there are no curved edges on any triangle.
There are no curved edges on a triangular pyramid.
There are no curved edges, but it does stack.
There are no curved edges in a pentagon. Part of the definition of any polygon is that they have straight edges.
In 3 dimensions, at least, a cube has no curved edges.
Curved.
There is one curved side and two curved edges (the rims along the top and bottom).
No, it can't, for curved edges you use a piercing saw!
there are 4 edges