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MariettaO [177]
3 years ago
13

Can someone please answer. There is one question. There's a picture. Thank you!

Mathematics
1 answer:
stepan [7]3 years ago
5 0
By Cosine Rule:

CosT = (s² + r² - t²) /(2sr)

<span>CosT = (10² + 11² - 7²) /(2*11*10)
</span>
<span>CosT = 172 /220 </span>≈ 0.7818

T = Cos⁻¹(0.7818)

T ≈ 38.57°

T ≈ 38.6°
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Step-by-step explanation:

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