A section (or slice) through a cone.
By taking different slices through a cone we can get:
• a circle (plane perpendicular to the axis of the cone),
• an ellipse (plane slightly tilted),
• a parabola (plane parallel to the side the cone) or
• a hyperbola (plane cuts both top and bottom parts of cone).
![Conic Section](../geometry/images/conic-ellipse.jpg)