Question

qual a distância entre o ponto A (1,1) e o ponto B (3,1) ​

Answer 1

$\large \boxed{ \begin{array}{l} \sf{\sf{d_{AB} = \sqrt{(x_A - x_B) {}^{2} + (y_A - y_B) {}^{2} } }} \\ \\ \sf{d_{AB} = \sqrt{(1 - 3) {}^{2} + (1 - 1) {}^{2} } } \\ \\ \sf{d_{AB} = \sqrt{( - 2) {}^{2} + 0 {}^{2} } } \\ \\ \sf{d_{AB} = \sqrt{4 + 0} } \\ \\ \sf{d_{AB} = \sqrt{4 \: } } \\ \\ \boxed{ \boxed{ \sf{d_{AB} = 2}}}\end{array}}$