Question

What is the area of the circle? (Round your answer to one decimal place)
line in circle 9in

Answer 1

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

\[
A = \pi r^2
\]

where \( A \) is the area and \( r \) is the radius of the circle. If the diameter of the circle is given as 9 inches, then the radius \( r \) is half of the diameter:

\[
r = \frac{9}{2} = 4.5 \text{ inches}
\]

Now, substitute the radius into the area formula:

\[
A = \pi (4.5)^2 = \pi \times 20.25
\]

Using \( \pi \approx 3.14 \):

\[
A \approx 3.14 \times 20.25 \approx 63.585
\]

Rounded to one decimal place, the area of the circle is:

\[
A \approx 63.6 \text{ square inches}
\]