ACT Math Practice Question #2013 (Hard (630)) | Test Citadel
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ACT Math Difficulty: Hard (630)

Digital ACT Math Practice Question #2013

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In triangle ABC, side a = 5, side b = 8, and angle C measures 60 degrees. What is the length of side c?
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Law of Cosines: c^2 = 5^2 + 8^2 - 2(5)(8)*cos(60°) -> c = 7.

Masterclass Solution & Distractor Trap Analysis

By the Law of Cosines: c^2 = a^2 + b^2 - 2ab*cos(C) = 25 + 64 - 2(5)(8)*cos(60°). Solving gives c = 7....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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