Question

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

Answer 1

Answer:

B

Step-by-step explanation:

Using the Sine Rule in ΔABC

$\frac{a}{sinA}$ = $\frac{b}{sinB}$ = $\frac{c}{sinC}$

∠C = 180° - (82 + 58)° = 180° - 140° = 40°

Completing values in the above formula gives

$\frac{a}{sin58}$ = $\frac{b}{sin82}$ = $\frac{8.4}{sin40}$

We require a pair of ratios which contain b and 3 known quantities, that is

$\frac{b}{sin82}$ = $\frac{8.4}{sin40}$

OR

$\frac{sin40}{8.4}$ = $\frac{sin82}{b}$ → B

Answer 2

Answer:

B!

Step-by-step explanation: