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alina1380 [7]
2 years ago
13

Pls help ASAP I’ll give brainliest

Mathematics
1 answer:
NARA [144]2 years ago
7 0

Answer:

  • B. 11.42

Step-by-step explanation:

<u>Use the law of cosines:</u>

  • c = \sqrt{a^2+b^2-2ab*cosC}

<u>Substitute the values:</u>

  • c = \sqrt{9^2+12^2-2*9*12*cos64}=11.42
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