A circle is not a 3D figure because it only has two dimensions. A sphere is a 3D "circle".
Yes.
A cube is a 3d square. A sphere is a 3d circle. A prism is a 3d rectangle.
A dodecahedron.
its volume
The cone IS a 3d figure.
It depends on the type of figure. If it is a 2D figure, then it is called area. If it is a 3D figure, then it is called volume.
A circle is not a 3D figure because it only has two dimensions. A sphere is a 3D "circle".
A 3D figure shows length, width and depth. While a 2D figure only shows length and width.
Depends
A solid.
Yes.
A cube is a 3d square. A sphere is a 3d circle. A prism is a 3d rectangle.
A cuboid
Dodecahedron
its volume
A dodecahedron.