Question

the radius of a circle is 18 cm. find its area in terms of π.

Explanation:

Step1: Recall the formula for the area of a circle

The formula for the area of a circle is \(A = \pi r^{2}\), where \(r\) is the radius of the circle.

Step2: Substitute the given radius into the formula

Given \(r = 18\) cm. Substitute \(r = 18\) into \(A=\pi r^{2}\), we get \(A=\pi\times(18)^{2}\).

Step3: Calculate \((18)^{2}\)

\((18)^{2}=18\times18 = 324\). So \(A = 324\pi\) \(cm^{2}\).

Answer:

\(324\pi\) \(cm^{2}\)