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natulia [17]
4 years ago
13

If a = 9 and c = 20, the measure of ∠B = ____ degrees (to the nearest tenth).

Mathematics
2 answers:
Archy [21]4 years ago
8 0

Answer:

63

Step-by-step explanation:

cos(B) =  

adj

hyp

cos(B) =  

9

20

thus,

B = cos-1 (

9

20

)

B = 63.26

Nina [5.8K]4 years ago
4 0
You are going to need to include a picture so we can see the triangle.
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