Question

alcule a distância do ponto A( 5, -12 ) à origem do sistema cartesiano e assinale a alternativa correta.

 

  12
  11
  16
  15
  13

Answer 1

$d=\sqrt{(x_-x_0)^2+(y-y_0)^2} \\\\\ d=\sqrt{(5_-x_0)^2+(-12-y_0)^2} \\\\\ d=\sqrt{5^2+12^2} \\\\\ d=\sqrt{25+144}\\\\d=\sqrt{169}\\\\d=13$