Focus
A point that helps define an ellipse, parabola or hyperbola.
On the right we see the focus of a parabola:
An ellipse (and a hyperbola) has two focus points, here they are labeled F and G on an ellipse ... have a play:
See: Parabola
- hyperbolic functions
- hypercube
- hypocycloid
- hypotenuse
- hypothesis
- i (unit imaginary number)
- icosahedron
- identity
- image
- imaginary number
- imperial system
- improper fraction
- incenter
- inch
- incircle
- incircle of triangle
- included angle
- included side
- income
- increase
- increment
- indefinite integral
- independent event
- independent variable
- indeterminate