flat surfaces on any polyhedron are called faces
Faces
a rectangular prism, which is a 3D rectangle.
A triangular PYRAMID has a triangular base.
cube, prism, pyramid, cone, cylinder, etc.
The question is ambiguous since a rectangular pyramid and a rectangular prism will have different numbers of flat surfaces. There is no indication in the question which shape is intended.
A prism is 3d and a pyramid is in 2d
They are called faces.
The flat surfaces on a pyramid are called faces. A pyramid has one base and triangular faces that meet at a single point called the apex. On a cube or rectangular prism, the flat surfaces are called faces as well. But unlike a pyramid, a cube has six square faces, while a rectangular prism has two rectangular bases and four rectangular faces.
Rectangular prism: 8 Rectangular pyramid: 5
a rectangular prism, which is a 3D rectangle.
Nope - all surfaces are flat on a rectangular prism.
rectangle triangle there is a difference
A pyramid with 18 edges would be called a nonagonal pyramid. A prism with 18 edges is called a hexagonal prism.
They both have a rectangle at the bottom of the two prisms.
a square a rectangle and a parallelogram
A prism. A rectangle is a special kind of prism. It is called a cuboid.
not a pyramid!! well a triangular won't but still pyramids have 4 flat surfaces.
A triangular PYRAMID has a triangular base.