Question

find the area of the triangle below. be sure to include the correct unit in your answer.

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 $b = 21$ cm and the height $h=5$ cm.

Step3: Calculate the area

Substitute $b = 21$ and $h = 5$ into the formula: $A=\frac{1}{2}\times21\times5=\frac{105}{2}= 52.5$ $cm^{2}$.

Answer:

$52.5$ $cm^{2}$