1 Answer

Solowalker · Answer 1 · 2020-08-17T17:20:54+0000

Answer: 117°

Explanation:

Use the Law of Cosines:

c² = a² + b² - 2ab · cos C

12² = 6² + 8² - 2(6)(8)(cos C)

144 = 36 + 64 - 96 cos C

144 = 100 - 96 cos C

44 = -96 cos C

$-(44)/(96)=cosC\\\\\\cos^(-1)\bigg(-(44)/(96)\bigg)=C$

117° = C

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