Solution
Recall the Formula
[tex]\text{Area}=\frac{1}{2}ab\text{ sin}C[/tex]
Given
C = 43°, b = 21, a = 28
[tex]\begin{gathered} \text{Area}=\frac{1}{2}\times28\times21\times\sin 43 \\ \text{Area}=200.5075 \end{gathered}[/tex]
The final answer
[tex]\text{Area}=200.5075unit^2[/tex]
