Can anyone help me with this?

[tex]\\ \rm{:}\rightarrowtail tan50=\dfrac{p}{12}[/tex]
[tex]\\ \rm{:}\rightarrowtail p=12tan50[/tex]
[tex]\\ \rm{:}\rightarrowtail p=12(1.19)=14.3[/tex]
Now
Area=
[tex]\\ \rm{:}\rightarrowtail \dfrac{1}{2}(12)(14.3)=6(14.3)=85.8cm^2[/tex]