# Parabolas

Martin McBride, 2020-09-12
Tags parabola focus directrix tangent normal
Categories coordinate systems pure mathematics

We have previously seen how a parabola is defined in terms of parametric equations.

In this section we will look at further aspects of parabolas:

• The Cartesian equation of a parabola.
• The parabola as a locus - the focus and directrix.
• The effect of the parameter $a$ on a parabola - all parabolas are the same shape.
• Tangents and normals of a parabola.