Question

determine a distancia entre os pontos p=(1, 8) q=(-3, 5)

Answer 1

$p=(1, 8); q=(-3, 5)\\\\\\ D_{p,q} = \sqrt{(x_q-x_p)^2+(y_q-y_q)^2} \to \\\\\\ D_{p,q} = \sqrt{(-3-1)^2+(5-8)^2} \to \\\\ D_{p,q} = \sqrt{(-4)^2+(-3)^2} \to \\\\ D_{p,q} = \sqrt{16+9} \to \\\\ D_{p,q} = \sqrt{25} \to \\\\ D_{p,q} = 5$