Question

11 ft.
Shape: Circle
Circumference Formula: C = 2πr
Find the radius (r) of a circle with a circumference of 69.08 feet.
r = C ÷ π/2
Use 3.14 for pi (π).
C = [?] ft.

Answer 1

To find the radius \( r \) of a circle with a circumference of \( C = 69.08 \) feet using the formula for circumference \( C = 2\pi r \), follow these steps:

1. Rearrange the formula to solve for \( r \):
\[
r = \frac{C}{2\pi}
\]

2. Substitute the value of \( C \) and \( \pi \) (using 3.14):
\[
r = \frac{69.08}{2 \times 3.14}
\]

3. Calculate \( 2 \times 3.14 \):
\[
2 \times 3.14 = 6.28
\]

4. Now divide \( 69.08 \) by \( 6.28 \):
\[
r = \frac{69.08}{6.28} \approx 11
\]

So, the radius \( r \) is approximately \( 11 \) feet.

Given \( C = 69.08 \) feet, your answer for the radius \( r \) is:
\[
r \approx 11 \text{ ft}
\]