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In ΔQRS, q = 1.3 inches, r = 1.6 inches and ∠S=157°. Find the length of s, to the nearest 10th of an inch.
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5 votes
In ΔQRS, q = 1.3 inches, r = 1.6 inches and ∠S=157°. Find the length of s, to the nearest 10th of an inch.

User Shernette
by
4.1k points

1 Answer

6 votes

Answer:

2.8

Explanation:

using cosine rule


s^(2) =
1.3^(2) + 1.6^(2) - 2(1.3)(1.6)cos 157

s =
√(8.0793) = 2.842 = 2.8

User Chiubaka
by
4.4k points
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