Please help I dont understand

Ufuk Onder asked May 14, 2023

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44 votes

Ufuk Onder asked May 14, 2023

2.6k points

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30 votes

Answer:

50 degrees

Explanation:

By the Law of Cosines,

6² = 7.5² + 6.5² - 2(6.5)(7.5)cos C

6² - 7.5² - 6.5² = -2(6.5)(7.5)cos C

-62.5 = -97.5 cos C

cos C = (-62.5)/(-97.5) = 25/39

C = arccos(25/39), which is about 50°

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