Question

You are making a triangle-shaped pennant out of fabric. The base of the pennant is 5 inches and the height is 13 inches. How many fabric do you need to make the pennant?

Answer 1

$\text{Area}=32.5in^2$

Explanation

the area of a triangle is given by:

$\text{Area}=\frac{base\cdot heigth}{2}$

the, to know the fabric you need, you need to finde the area

Let

base=5 in

heigth=13 inches

now, replace.

$\begin{gathered} \text{Area}=\frac{base\cdot heigth}{2} \\ \text{Area}=\frac{5\text{ in}\cdot13\text{ in}}{2} \\ \text{Area}=\frac{65in^2}{2} \\ \text{Area}=32.5in^2 \end{gathered}$

I hope this helps you