Las coordenadas del vértice son los valores ( h , k ) {\displaystyle (h,k)}
Arriba
( x − h ) 2 = 4 p ( y − k ) {\displaystyle (x-h)^{2}=4p(y-k)} .
foco es ( h , k + p ) {\displaystyle (h,k+p)}
lìnea recta L ( h + 2 p , k + p ) , R ( h − 2 p , k + p ) {\displaystyle L(h+2p,k+p),R(h-2p,k+p)}
Abajo
( x − h ) 2 = − 4 p ( y − k ) {\displaystyle (x-h)^{2}=-4p(y-k)}
foco ( h , k − p ) {\displaystyle (h,k-p)}
lìnea recta L ( h − 2 p , k − p ) , R ( h + 2 p , k − p ) {\displaystyle L(h-2p,k-p),R(h+2p,k-p)}
Derecha
( y − k ) 2 = 4 p ( x − h ) {\displaystyle (y-k)^{2}=4p(x-h)}
foco ( h + p , k ) {\displaystyle (h+p,k)}
lìnea recta
L ( h + p , k + 2 p ) , R ( h + p , k − 2 p ) {\displaystyle L(h+p,k+2p),R(h+p,k-2p)}
Izquierda
foco ( h − p , k ) {\displaystyle (h-p,k)}
lìnea recta L ( h − p , k + 2 p ) , R ( h − p , k − 2 p ) {\displaystyle L(h-p,k+2p),R(h-p,k-2p)}
( y − k ) 2 = − 4 p ( x − h ) {\displaystyle (y-k)^{2}=-4p(x-h)}
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