Answer:
6.7 km
Step-by-step explanation:
Darla made a right-angle turn, so the distance of interest is the hypotenuse of a right triangle with legs 3 km and 6 km. The Pythagorean theorem tells you that distance is ...
d = √(3² +6²) = √45 ≈ 6.7 . . . km
The direct distance is about 6.7 km.
