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In triangle ABC, a = 3, b = 5, and c = 7. Find the approximate value of angle A. 22° 38° 142° 158°
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1 vote
In triangle ABC, a = 3, b = 5, and c = 7. Find the approximate value of angle A. 22° 38° 142° 158°

User Krezus
by
7.9k points

2 Answers

0 votes

Answer:

22

Explanation:

law cosines

a^2=b^2+c^2 - 2bc cos A

plug in numbers

21.7 ish

round

22

User Jalkin
by
8.2k points
5 votes

Answer:

B.

Explanation:

B.

User Imcg
by
8.3k points
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