# General Parabola Equation

General Parabola Equation

Let the equation of the directrix of a parabola be the normalized line , where the point is on the unit circle. Let the focus be . The equation of the parabola is then =+.

Ax+By+C=0

(A,B)

(,)

f

1

f

2

2

(Ax+By+C)

2

(x-)

f

1

2

(y-)

f

2