Find x when there's a right triangle,
leg 1 = 2 miles
leg 2 = 3 miles
hypotenuse = x
put answer as a simplified radical.

To find out the missing leg of a right triangle, you have to use the Pythagorean Theorem which is a^2 + b^2 = c^2. C is the hypotenuse. So, substitute the numbers into that equation. 

2^2 + 4^2 = x
4 + 16 = x
20 =