Digital ACT Math Practice Question #1400
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
Law of Cosines: c^2 = 7^2 + 9^2 - 2(7)(9)(0.5) = 67 -> sqrt(67).
By the Law of Cosines, c^2 = a^2 + b^2 - 2ab*cos(C) = 49 + 81 - 2(7)(9)(0.5) = 130 - 63 = 67. c = sqrt(67)....
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