### Home > MC1 > Chapter 9 > Lesson 9.3.2 > Problem9-139

9-139.

$\text{The area of a triangle is equal to }\left(\frac{1}{2}\right)(\text{base})(\text{height}).$

$\left(\frac{1}{2}\right)(10)(6)=30\text{ feet}^2$

Draw a diagram like the one in part (a), if you need help visualizing the triangle.