[tex]\text{Answer : Area is 18 in}^2[/tex]
[tex]\begin{gathered} \text{Area of a triangle = }\frac{1}{2}\text{ b x h} \\ h\text{ = 12 in} \\ b\text{ = }3\text{ in} \\ \text{Area = }\frac{1}{2}\text{ x 3 x 12} \\ \text{Area = }\frac{3\text{ x 12}}{2} \\ \text{Area = }\frac{36}{2} \\ \text{Area = 18 in}^2 \end{gathered}[/tex]
