Question

find the area. a =? cm² a = πr² use π = 3.14

Explanation:

Step1: Find the radius

Given diameter \(d = 22\mathrm{cm}\), radius \(r=\frac{d}{2}\).
\(r=\frac{22}{2}=11\mathrm{cm}\)

Step2: Calculate the area

Use the formula \(A = \pi r^{2}\), with \(\pi = 3.14\) and \(r = 11\).
\(A=3.14\times11^{2}\)
\(A = 3.14\times121\)
\(A=379.94\mathrm{cm}^{2}\)

Answer:

\(379.94\)