All rulings (generatrices) of a cylinder are parallel.

desni klik za pokretanje animacije

The plane at infinity also intersects the cylinder in two generatrices. There are three types of cylinders with respect to this intersection:

hyperbolic cylinder |
parabolic cylinder |
elliptic cylinder |

The type of this conic (hyperbola, parabola or ellipse) depends on the type of the cylinder.

The plane that is not parallel to the generatrices of a cylinder intersects the cylinder in:

right-click to start the animation

Tangent planes of a cylinder pass through its vertex (point at infinity) and
they are
parallel to generatrices of the cylinder. All other points of a cylinder are regular - they have an unique tangent plane. |

These planes can be real or imaginary. The construction of these planes is given in the animation on the right side. |
Click on the image to start the animation.. |

A circular cone is obtained by rotating one line about another parallel line (axis of rotation).

Every plane perpendicular to the axis intersects the circular cylinder at a circle.

A cylinder will be given by one circle intersection called a base of the cylinder and its height.

Point of a generatrix that lies on the base is called

Created by Sonja Gorjanc, translated by Helena Halas and Iva Kodrnja - 3DGeomTeh - Developing project of the University of Zagreb