a =18.5
The formula:
[tex]a^2=c^2+b^2-2cb\cos (A)[/tex]
a = ?
A = 112
b = 8
c = 14
[tex]\begin{gathered} a^2=8^2+14^2-2\cdot8\cdot14^2\cos (112) \\ a^2=64+196-2\cdot8\cdot14\cdot(-0.3746) \\ a^2=64+196+83.91188 \\ a^2=343.9118 \\ a=\sqrt[]{343.9118} \\ a=18.544 \\ a\cong18.5 \end{gathered}[/tex]
