Question

calcule a distância entre os dois pontos de cada item A 2,1 e B 5,5

Answer 1

$A~(2,1)~~e~~B~(5,5)\\\\\\ D_{ab}= \sqrt{(x_b-x_a)^2+(y_b-y_a)^2} \\\\\\ D_{ab}= \sqrt{(5-2)^2+(5-1)^2} \to \\\\ D_{ab}= \sqrt{(3)^2+(4)^2} \to \\\\ D_{ab}= \sqrt{9+16} \to \\\\ D_{ab}= \sqrt{25} \to \\\\ \large\boxed{D_{ab}= 5 }$