Question

find the area. 9 cm

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: Identify the radius from the diagram.

From the diagram, the radius \( r \) of the circle is given as \( 9 \, \text{cm} \).

Step3: Substitute the radius into the formula.

Substitute \( r = 9 \) into the formula \( A = \pi r^2 \). We get \( A = \pi \times (9)^2 \).

Step4: Calculate the value.

First, calculate \( 9^2 = 81 \). Then, \( A = \pi \times 81 = 81\pi \). If we use \( \pi \approx 3.14 \), then \( A \approx 81 \times 3.14 = 254.34 \, \text{cm}^2 \).

Answer:

The area of the circle is \( 81\pi \, \text{cm}^2 \) (or approximately \( 254.34 \, \text{cm}^2 \)).