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Find BC. PLEASE HELP ASAP!! A. 28 in B. 29 in C. 30 in D. 22.5 in
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4 votes
Find BC. PLEASE HELP ASAP!!
A. 28 in
B. 29 in
C. 30 in
D. 22.5 in

Find BC. PLEASE HELP ASAP!! A. 28 in B. 29 in C. 30 in D. 22.5 in-example-1
User Crowjonah
by
3.9k points

1 Answer

2 votes

Answer:

Choice B. 29

Explanation:

Use law of cosines:


a^2=b^2+c^2-bcCosA


a=√(b^2+c^2 -bcCosA)


a=√(19^2+12^2-(19)(12)Cos138)


a=29.0495

User Airtonix
by
4.0k points
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