Question

a distancia entre os pontos A=(5 -1) eB (2,3) é igual a)25 b)7,28 c)5 d)3

Answer 1

$d^{2} = ( x_{1} - x_{2})^{2} + ( y_{1} - y_{2})^{2} \\ d^{2} = ( 5 - 2)^{2} + ( -1 - 3)^{2} \\ d^{2} = 9 + 16 \\ d^{2} = 25 \\ d = \sqrt{25} \\ d = 5$