Question

sendo A(7,5) e (4,2) determine a medida ab

Answer 1

$\sqrt{(xa - xb) { }^{2} + (ya - yb) {}^{2} }$
$\sqrt{(7 - 4) {}^{2} + (5 - 2) {}^{2} }$
$\sqrt{9 + 9} = \sqrt{18}$
$3 \sqrt{2}$