Geometría Analítica/Apendices/Formulario Recta

Distancia de dos puntos bidimensionales

$d_{\overline {AB}}={\sqrt {(x_{B}-x_{A})^{2}+(y_{B}-y_{A})^{2}}}\,$

${\overline {AB}}=(x_{B}-x_{A})\,\mathbf {i} +(y_{B}-y_{A})\,\mathbf {j}$