In a right triangle, the hypotenuse is the longest side, which is opposite the right angle. Based on the information provided:
- 11.9 km
- 14.7 km
- X (length unknown)
Since we know that 14.7 km is greater than 11.9 km, the hypotenuse of this triangle would be the side labeled 14.7 km.
So the correct response is:
The side labeled 14.7 km.