Given:
Base of the triangle, b = 12 inches
Height of triangle, h = 2.1 inches
To find the area of the triangle, use the formula below:
[tex]A=\frac{1}{2}\ast b\ast h[/tex]Thus, we have:
[tex]\begin{gathered} A=\frac{1}{2}\ast12\ast2.1 \\ \\ A=6\ast2.1=12.6\text{ square inches} \end{gathered}[/tex]Therefore, the area of the triangle-shaped piece of wood is 12.6 square inches.
ANSWER:
12.6 sq. inches