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Dmitry [639]
3 years ago
14

Please help! I'm not very good with geometry ;~;

Mathematics
2 answers:
enyata [817]3 years ago
4 0
Z = AB
Y = AC
C = BC
Is your answer to
kati45 [8]3 years ago
3 0
Ab=z Bc=x Ac=y. is the answer
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SOMEONE PLEASE HELP!
Andrews [41]

Answer:

17.2°

Explanations

To find angle A, use the cosine rule.

a^2 = b^2 + c^2 - 2 × a × c cos A

4^2 = 7^2 + 10^2 - 2 × 7 × 10 cos A

16 = 49+ 100 - 140 × cosA

16 = 149 - 140cosA

16- 149 = - 140cosA

-133 = - 140cosA

cosA = 133/140

cosA = 0.95

A = 17.2°

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