Question

the diameter of a circle is 18 meters. what is the area?
$d=18$ m
give the exact answer in simplest form.
$square$ square meters

Explanation:

Step1: Calculate the circle's radius

$r = \frac{d}{2} = \frac{18}{2} = 9$ m

Step2: Apply circle area formula

$A = \pi r^2 = \pi \times 9^2$

Step3: Simplify the expression

$A = 81\pi$

Answer:

$81\pi$ square meters