Illustration showing the definition of a circle as a conic section. The section of a right circular…

Illustration showing a cone cut by a plane that is along the axis of symmetry.

Illustration showing the definition of an ellipse as a conic section. The section of a right circular…

Illustration showing the definition of an hyperbola as a conic section. A hyperbola is formed from a…

Illustration showing the definition of a parabola as a conic section. The section of a right circular…

Illustration of pentagonal and triangular pyramids cut by a plane parallel to the bases.