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-BARSIC- [3]
2 years ago
5

Please help, I dont know what formula to use. BC=?

Mathematics
1 answer:
vladimir1956 [14]2 years ago
5 0

Answer:

17

Step-by-step explanation:

Note angle B = 180 - 51 - 39 = 90°

Use sin(39) = BC/27

OR cos(51) = BC/27

Get BC = 17

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