The focus (or foci - plural) of a conic section is the point (or points) from which the distance to each point on the graph of the conic section is constant as defined by the specific conic section's equation.

Last modified on 15 June 2009, at 10:08
# Conic Sections/Focus

The focus (or foci - plural) of a conic section is the point (or points) from which the distance to each point on the graph of the conic section is constant as defined by the specific conic section's equation.