Question

Which proportion could be used to find the length of side b?

Answer 1

C

Explanation:

Using the Sine rule in Δ ABC

Calculate the measure of ∠ C

∠ C = 180° - (64 + 85)° = 180° - 149° = 31° , then

`(sin31)/(9.3)` =
`(sin85)/(b)` → C