A projection.
A net is a 2D representation of a 3D shape
in 2D, a heptagon in 3D, a heptahedron
no solid figure has only face the only shapes that has 1 face is 2d shapes
A flat piece of paper is 2D. A cube is 3D. Therefore the drawing of the cube is a representation.
2d
A net is a 2D representation of a 3D shape
Map
in 2D, a heptagon in 3D, a heptahedron
The 2D name for an octagonal prism is an octagon. An octagonal prism consists of two parallel octagonal bases connected by rectangular faces, but when referring to its 2D representation, it is simply an octagon.
A projection is a 2 dimensional representation of a solid figure. See related link.
You cannot have a 2d pyramid - whether or not it is square based. The 2d cross section will depend on the plane of the cross section.
three
Topography is a 2D representation of geography, relief is 3D, making it easier to visualize relative elevations.
It is a 2D net that represents a 3D figure
no solid figure has only face the only shapes that has 1 face is 2d shapes
it is same as surface and volume ! a plane angle is 2D and solid angle is 3D
No because it is flat 2d shape with 4 equal sides