Question

The radius of a circle is 2 kilometers. What is the circle's area?
r=2 km
Use ​𝜋 ≈ 3.14 and round your answer to the nearest hundredth.
square kilometers

Answer 1

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

\[
\text{Area} = \pi r^2
\]

Given that the radius \( r = 2 \) km and using \( \pi \approx 3.14 \):

1. **Calculate \( r^2 \)**:
\[
r^2 = 2^2 = 4 \text{ km}^2
\]

2. **Calculate the area**:
\[
\text{Area} = 3.14 \times 4 = 12.56 \text{ square kilometers}
\]

Now, rounding to the nearest hundredth, the area is:

\[
\boxed{12.56} \text{ square kilometers}
\]