Question

determine a distancia entre os pontos (-4,5) (-4,-3)?

Answer 1

$A~(-4~;~5)~~e~~B~(-4~;~-3)\\\\\\ D_{ab}= \sqrt{(x_b-x_a)^2+(y_b-y_a)^2} \to\\\\\\ D_{ab}= \sqrt{(-4-(-4))^2+(-3-5)^2} \to\\\\ D_{ab}= \sqrt{(-4+4)^2+(-8)^2} \to\\\\ D_{ab}= \sqrt{0^2+64} \to\\\\ D_{ab}= \sqrt{64} \to\\\\ \boxed{D_{ab}=8 }$