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21) Find the measure of angle B.
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21) Find the measure of angle B.

21) Find the measure of angle B.-example-1
User Cottton
by
4.1k points

1 Answer

6 votes

Answer:

∠ B ≈ 56.3°

Explanation:

Using the cosine ratio in the right triangle

cos B =
(adjacent)/(hypotenuse) =
(BC)/(AB) =
(5)/(9) , then

B =
cos^(-1) (
(5)/(9) ) ≈ 56.3° ( to the nearest tenth of a degree )

User Chris Barry
by
4.0k points
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