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General triangle word problems

A traveler comes upon a fork in the road.
On the path to the traveler's right, a sign reads "Mercer: 24km24\,\text{km}."
On the path to the traveler's left, a sign reads "Turtle Lake: 17km17\,\text{km}."
The traveler also observes that the angle between the paths is 7575^\circ.
Assuming both paths are perfectly straight, what is the distance between Mercer and Turtle Lake?
Do not round during your calculations. Round your final answer to the nearest tenth of a kilometer.
  • Your answer should be
  • an integer, like 66
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
  • an exact decimal, like 0.750.75
  • a multiple of pi, like 12 pi12\ \text{pi} or 2/3 pi2/3\ \text{pi}
km\text{km}