Question

find the area.
a = ? ft²

Explanation:

Step1: Recall the formula for the area of a triangle

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

Step2: Identify the base and height

From the problem, the base \( b = 18\) ft and the height \( h=10\) ft.

Step3: Substitute the values into the formula

Substitute \( b = 18\) and \( h = 10\) into \( A=\frac{1}{2}\times b\times h\).

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Step4: Calculate the result

\(9\times10 = 90\)

Answer:

\(90\)