None.
it has 0 curved edges
No, it can't, for curved edges you use a piercing saw!
6
A hexagonal prism has 18 edges.
None.
no
A 6 sided hexagon has 6 sides but no edges
A hexagon is a six side shape, which means it has 6 edges.
it has 0 curved edges
it has 0 curved edges
If the figure has curved edges, then it's not a "rectangle".
hexagon _ / \ \_/ ............. actually a hexagon has six SIDES not edges but a pyramid has 4 sides and SIX EDGES. Space
A hexagon has six sides.
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.