Question

determine a distancia entre os seguintes pontos
a)  A(-3,7) e B(5,1)

Answer 1

$D = \sqrt{(x_a-x_b)^2+(y_a-y_b)^2} \\\\\\ D = \sqrt{(-3-5)^2+(7-1)^2} \\\\\\ D = \sqrt{(-8)^2+(6)^2} \\\\\ D = \sqrt{64+36} \\\\\\ D = \sqrt{100}\\\\\\ \boxed{D=10}$