Answer
20 meters
Work Step by Step
Point B is 3 meters east and one meter north of Point A
$3^2+1^2=c^2$
$9+1=c^2$
$10=c^2$
$\sqrt {10} =\sqrt {c^2}$
$3.1623 = c$
Point C is 19 meters east and 13 meters north of Point A
$19^2+13^2=c^2$
$361+169=c^2$
$530 = c^2$
$\sqrt {530} =\sqrt {c^2}$
$23.02=c$
$23.02-3.16=19.86$
