Conic Sections

https://en.wikipedia.org/wiki/Conic_section Conic Sections

A [https://en.wikipedia.org/wiki/Cone can be described as the Locus of all lines joining points on the circumference of a base circle to a point above it. If the point lies perpendicularly above the centre of the base circle it is known as a ‘right cone’ and if not, it is an ‘oblique cone’.

A right circular cone is a Solid of Revolution and can be produced by rotating a right angle triangle around one of the sides opposite its hypotenuse.

A right circular cone can be sliced across in various ways to produce a number of Conic Sections. These are curves with particular mathematical properties and which are used in engineering design - e.g. cam profiles and arch bridge design.

Ellipse	- the curve produced when a secton is taken across a right circular cone, at an angle to the base circle, and intersecting the generators on both sides
C	D