Question

caucule a distância entre os pontos A(4, -8,-9)e B(2,-3,-5)​

Answer 1

$dAB=\sqrt{(x_A-x_b)^2+(y_A-y_B)^2+(z_A-z_B)^2}$

$dAB=\sqrt{(4-2)^2+(-8-(-3))^2+(-9-(-5))^2}$

$dAB=\sqrt{2^2+(-8+3)^2+(-9+5)^2}$

$dAB=\sqrt{4+(-5)^2+(-4)^2}$

$dAB=\sqrt{4+25+16}$

$dAB=\sqrt{45}$

$dAB=\sqrt{9.5}$

$dAB=3\sqrt{5}$