Question

find the area.
15 ft
20 ft
a = ? ft²

Explanation:

Step1: Recall the formula for the area of a triangle

The formula for the area of a triangle is \(A=\frac{1}{2}\times base\times height\).

Step2: Identify the base and height

Here, the base \(b = 20\) ft and the height \(h=15\) ft.

Step3: Substitute the values into the formula

Substitute \(b = 20\) and \(h = 15\) into \(A=\frac{1}{2}\times b\times h\). So, \(A=\frac{1}{2}\times20\times15\).
First, calculate \(20\times15 = 300\). Then, \(\frac{1}{2}\times300=150\).

Answer:

\(150\)