this shape has the num 5
Yes.
A figure that has a curved face or curved edge.
yes polygons are closed figures
It's not true. As with all solid figures, polyhedra have volume and surface area.
For example, figures like C and N are open figures, and figures like O and D are closed.
Yes quadrilaterals are 4 sided closed figures or polygons
A prism is a polyhedron.
A sphere has no faces an corners. The term "faces" and "corners" are applied to polyhedrons, figures with flat surfaces.
The buliding top of a city skyline is closed
A polygon
No. Polyhedrons are any shape with multiple sides. A triangle and a prism are just two different kinds of polyhedrons.
Well, darling, those solid figures with more than six faces are called polyhedrons. They're like the cool kids of geometry, strutting around with their multiple faces and edges. So next time you see one, just remember they're not just any old shape - they're polyhedrons, honey.