4 cm

Shape: Circle
Calculate the area of the circle.
Area of a circle: 3.14 x r²
A = [?] cm²
Round to the nearest hundredth.

1 answer

To calculate the area of a circle with a radius of 4 cm, you can use the formula:

\[ A = \pi r^2 \]

Given that \( \pi \) is approximately 3.14 and the radius \( r = 4 \) cm:

\[ A = 3.14 \times (4)^2 \]

First, calculate \( (4)^2 \):

\[ (4)^2 = 16 \]

Now substitute back into the area formula:

\[ A = 3.14 \times 16 \]

Now multiply:

\[ A = 50.24 \text{ cm}^2 \]

Therefore, the area of the circle is:

\[ A = 50.24 \text{ cm}^2 \]

When rounded to the nearest hundredth, it remains:

\[ A = 50.24 \text{ cm}^2 \]