9 in

Shape: Circle
Calculate the area of the circle.
Area of a circle: 3.14 x r²
A = [?]in²

1 answer

To calculate the area of a circle, you can use the formula:

\[ A = \pi r^2 \]

You've provided \( r = 9 \) inches. Using \( \pi \approx 3.14 \):

\[ A = 3.14 \times (9)^2 \]

First, calculate \( 9^2 \):

\[ 9^2 = 81 \]

Now, substitute back into the area formula:

\[ A = 3.14 \times 81 \]

Now perform the multiplication:

\[ A \approx 3.14 \times 81 = 254.34 \]

Thus, the area of the circle is approximately:

\[ A \approx 254.34 \text{ in}^2 \]