Question

calcule a distancia entre os pontos a(1,9) b(2,8)

Answer 1

Bom dia

$D= \sqrt{(x_{b}- x_{a})^2+( y_{b}- y_{a})^2}$
$D= \sqrt{(2-1)^2+( 8-9)^2}$
$D= \sqrt{2} = 1,41$