Question

find the area of the triangle. a = □ in²

Explanation:

Step1: Recall area formula

The formula for the area of a triangle is $A=\frac{1}{2}bh$, where $b$ is the base and $h$ is the height.

Step2: Identify base and height

From the figure, the base $b = 12$ in and the height $h=9$ in.

Step3: Calculate the area

Substitute $b = 12$ and $h = 9$ into the formula: $A=\frac{1}{2}\times12\times9$. First, $\frac{1}{2}\times12 = 6$, then $6\times9=54$.

Answer:

$54$