Question

5 ft.
Shape: Circle
Circumference Formula: C = 2πr
What is the circumference of a circle with a radius of 5 feet?
Use 3.14 for pi (π).
C = [?] ft.

Answer 1

To calculate the circumference of a circle using the formula \( C = 2\pi r \), where \( r \) is the radius of the circle:

Given:
- Radius \( r = 5 \) feet
- Use \( \pi \approx 3.14 \)

Now, substitute the radius into the formula:

\[
C = 2 \times 3.14 \times 5
\]

Calculating it step by step:

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

2. Then multiply by the radius (5):
\[
6.28 \times 5 = 31.4
\]

Thus, the circumference \( C \) of the circle is:

\[
C = 31.4 \text{ ft.}
\]