Question

find the area.
(image of a triangle with base 18 ft and height 10 ft)
a = ? ft²

Explanation:

Step1: Recall triangle area formula

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

Step2: Identify base and height

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

Step3: Substitute into formula

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

Step4: Calculate the result

First, \( 18 \times 10 = 180 \), then \( \frac{1}{2} \times 180 = 90 \).

Answer:

90