Essential revision or learning for a wealth of disciplines like architecture, physics, engineering or design. Understanding the qualities of circles, lines and cones together with a thorough explanation of vectors, provide an excellent foundation to further study.

# Conic sections

Conic sections are the curves obtained when a cone is cut by a plane. The equation of one of these curves, the parabola, is found by using an alternative description in terms of points whose distances from a fixed point and a fixed line are equal. Video tutorial 36 mins.