Question

find the area.
22 cm
a = ? cm²
a = πr²

Explanation:

Step1: Find the radius

The diameter \( d = 22 \, \text{cm} \), and radius \( r=\frac{d}{2}\). So \( r = \frac{22}{2}=11 \, \text{cm} \).

Step2: Calculate the area

Using the formula \( A=\pi r^{2} \), with \( \pi = 3.14 \) and \( r = 11 \, \text{cm} \). Substitute the values: \( A = 3.14\times11^{2} \). First, calculate \( 11^{2}=121 \), then \( 3.14\times121 = 379.94 \, \text{cm}^2 \).

Answer:

\( 379.94 \)