Which of the following 3D surfaces [b]cannot [/b]be formed by rotating a 2D figure about a line?
The [b]2D figure you saw on the left side[/b] is called the [b]CROSS SECTION. [/b]The 3D surface on the right is said to be a [b]SURFACE OF REVOLUTION. [br][br]What was common about the cross section of a CYLINDER and cross section of a CONE? [/b]
[b]What was different about the cross section of a CYLINDER and cross section of a CONE? [/b]