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

DeadKennedy asked Jul 2, 2022

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1 vote

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

DeadKennedy asked Jul 2, 2022

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24 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

Matteo Umili answered Jul 9, 2022

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