HELP THIS TRIGONOMETRY!

1 answer:

8 0

∠C = 180° - 45° - 65°
∠C = 70°

b/sin B = c/sin C
b/sin 65° = c/sin 70°
b = c/sin 70° × sin 65°
b = 20/0.9397 × 0.9063
b = 19.289
b = 19.3

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