One
A 2D shape does have one face.
It doesn't have any volume (3D) and it's not a line (1D). Thus, it is a 2D shape.
A rectangle is a 2D object with four sides or edges, but does not have any faces. Only 3D objects have faces. A rectangular pyramid has six faces.
A 2D sphere is a circle.
A 2d shape with uncountable lines of symmetry is a circle.
all 2D figures have 1 face.
trianle have no faces, because it is 2D figure.
A pentagonal prism has 7 faces - a prism of any 2D object will have (2D sides + 2) faces.e.g. An octagonal prism - 8 side octagon, 8+2=10 face prism.
One
One.
A hexagon
No, it's 2D. Anything that fits on a piece of paper (for example) is 2D. The 3D equivalent of a circle is a sphere.