Assertion: parabola's directrix | /r/HasAspect | the equation
Facets:
Source sentences:
text: If one introduces Cartesian coordinates, such that F = ( 0 , f ) , f > 0 , {\displaystyle F=(0,f),\ f>0,} and the directrix has the equation y = − f {\displaystyle y=-f} , one obtains for a point P = ( x , y ) {
text: Then, the directrix has an equation given by y = -p.
text: The directrix will have the equation .
text: The directrix will have the equation .
text: To derive an equation for a parabola, let's suppose (for now) that the directrix is horizontal and therefore has the equation:
text: Then, the directrix has an equation given by x = -p.