10 in

Question

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

Answer 1

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

\[ A = \pi r^2 \]

Given that the diameter of the circle is 10 inches, you need to first find the radius \( r \). The radius is half of the diameter:

\[ r = \frac{10}{2} = 5 \text{ inches} \]

Now, substitute the radius into the area formula:

\[ A = 3.14 \times (5)^2 \] \[ A = 3.14 \times 25 \] \[ A = 78.5 \text{ in}^2 \]

So, the area of the circle is:

\[ A = 78.5 \text{ in}^2 \]