Respuesta :

josshyaby

Answer:

Step-by-step explanation:

Using sine rule

SinA/a = SinB/b = SinC/c

A = 84° a = BC, C = 51°, c = 16

Sin84/BC = Sin51/16

Cross multiply

BC Sin51 = 16 × Sin84

BC = 15.91/Sin51

BC = 20.48unit

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