Question

Qual a distancia entre os pontos A(-1,1) e B(3,11/2) ?​

Answer 1

$\sqrt{ {(3 + 1)}^{2}+ {( \frac{11}{2} - \frac{2}{2} )}^{2} } = \sqrt{ {4}^{2} + {( \frac{9}{2} )}^{2} } = \\ \sqrt{16 + \frac{81}{4} } = \sqrt{ \frac{64}{4} + \frac{81}{4} } = \sqrt{ \frac{145}{4} } = \frac{ \sqrt{145} }{2}$