Question

Calcule a distância do ponto A( 5, -12 ) à origem do sistema cartesiano

Answer 1

$d=\sqrt{(x_b-x_a)^2+(y_b-y_a)^2}\\\\ d=\sqrt{(0-5)^2+(-12-0)^2}\\\\ d=\sqrt{(-5)^2+(-12)^2}\\\\ d=\sqrt{25+144}\\\\ d=\sqrt{169}\\\\ \boxed{\boxed{d=13}}$