The circumference of a circle is 43.96 kilometers. What is the circle's radius?
C=43.96 km
Use ​𝜋 ≈ 3.14 and round your answer to the nearest hundredth.

To find the radius of the circle, we can use the formula for the circumference of a circle:

\[
C = 2\pi r
\]

where:
- \( C \) is the circumference,
- \( r \) is the radius,
- \( \pi \) is approximately 3.14.

Given that the circumference \( C = 43.96 \, \text{km} \), we can substitute this value into the formula and solve for \( r \):

\[
43.96 = 2 \times 3.14 \times r
\]

Now, solve for \( r \):

\[
r = \frac{43.96}{2 \times 3.14}
\]

\[
r = \frac{43.96}{6.28}
\]

\[
r \approx 7.00 \, \text{km}
\]

So, the radius of the circle is approximately **7.00 kilometers**.

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Would you like a more detailed explanation, or do you have any questions?

Here are 5 related questions you could explore:
1. What is the area of a circle with this radius?
2. How would the circumference change if the radius were doubled?
3. How can we calculate the diameter from the radius?
4. What happens to the circumference if \( \pi \) is approximated differently, say as 3.1416?
5. How does the radius affect the perimeter of a sector of a circle?

**Tip:** Always make sure to round intermediate steps carefully when using approximations like \( \pi \).

The circumference of a circle is 43.96 kilometers. What is the circle's radius?

Learn how to calculate the radius of a circle given its circumference. This example uses the formula C = 2πr, with π approximated as 3.14, to find that the radius is 7.00 kilometers. Perfect for middle school students.

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