Question

find the missing side

Answer 1

13.9. Use pythagoras theorem to find it. Square root of 12*2 + 7*2 = square root of 193 = 13.89 ~ 13.9

Answer 2

Answer:

$\boxed{x=13.89\:km}$

Step-by-step explanation:

Pythagorean theorem

$x^2=(12^2)+(7^2)$

$x^2=144+49$

$x^2=193$

$x=\sqrt{193}$

$\boxed{x=13.89\:km}$