Digital ACT Math Practice Question #2016
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Law of Cosines: c^2 = 6^2 + 10^2 - 2(6)(10)*cos(60°) -> c = 2*sqrt(19).
By the Law of Cosines: c^2 = a^2 + b^2 - 2ab*cos(C) = 36 + 100 - 2(6)(10)*cos(60°). Solving gives c = 2*sqrt(19)....
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