A [i]cylinder [/i]is a surface that is generated by moving a straight line along a given planar curve while holding the line parallel to a fixed line. The curve is called the [i]generating curve[/i] for the cylinder. [br][br]In the interactive figure, the curve lies in the plane [math]y=2[/math] and the line is parallel to the [math]y[/math]-axis. Drag the figure to rotate the view.

[i]Developed for use with Thomas' Calculus, published by Pearson.[/i]