We need to find the area of each triangle and then do a sum of both
[tex]\begin{gathered} A_1=\frac{12\cdot7}{2}=\frac{84}{2}=42\text{ and } \\ A_2=\frac{12\cdot13}{2}=\frac{156}{2}=78\text{ } \end{gathered}[/tex]Then the total area of the figure is 120 inches^2
[tex]42+78=120[/tex]