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One face, the same as a circle. For both a 2D and a 3D oval it's the same. 3D ovals and circles have no vertices or edges. 2D ovals and circles have one edge.
a sphere
Sometimes because a sphere which is a 3d figure has a diameter
A circle is not a 3D figure because it only has two dimensions. A sphere is a 3D "circle".
Yes.
One face, the same as a circle. For both a 2D and a 3D oval it's the same. 3D ovals and circles have no vertices or edges. 2D ovals and circles have one edge.
a sphere
A rectangular prism is a solid figure with six rectangular faces.
Sometimes because a sphere which is a 3d figure has a diameter
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.
Both represent a shape and are a 3D figure but, a pyramid only has 1 face and prisms have 2 faces.