Kate, Jess and Kiki are setting up tents. If the distance between Kate and Jesss is 150 feet, and the distance between Kate and kiki is 200 feet, and the distance between Jess and kiki is 170 feet. What is the angle between Jess and Kiki
Kate 150 Jess
200 170
Kiki
We can find the angle thusly :
arccos [170^2 - 150^2 - 200^2] / [ -2(150)(200)] = about 55.9°
