Question

Qual a distancia entre os pontos P=(1,0) e Q=(2,8)??

Answer 1

$D_{PQ}= \sqrt{(x_Q-x_P)^2 +(y_Q-y_P)^2} \\ \\ D_{PQ}= \sqrt{(2-1)^2+(8-0)^2} \\ \\ D_{PQ}= \sqrt{1^2+8^2} \\ \\ D_{PQ}= \sqrt{1+64} \\ \\ D_{PQ}= \sqrt{65}$

Espero ter ajudado. Valeu!