true
If the figure has curved edges, then it's not a "rectangle".
it has 0 curved edges
it has 0 curved edges
Irregular shape is the term given to an object which has 1 flat side, 1 curved side, no corners but has curved edges.
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!