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Lubov Fominskaja [6]
4 years ago
5

Find AC. Round the answer to the nearest tenth.

Mathematics
1 answer:
Akimi4 [234]4 years ago
5 0
Use the Cosine Rule:-

AC^2 = 6^2 + 8^2 - 2*6*8 cos 78
         =  80.04

So AC = sqrt 80.04 =  8.9 to nearest tenth
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