Question

calcule a distância entre os pontos de casa ontem

C(8,2) e B(6,1)

Answer 1

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\d=\sqrt{(6-8)^2+(1-2)^2}\\d=\sqrt{(-2)^2+(-1)^2}\\d=\sqrt{4+1}\\\boxed{d=\sqrt5 \approx 2,24}$