The circumference of a circle can be calculated using the formula:
- C = 2πr
Where:
- C is the circumference
- π (Pi) is approximately 3.14159
- r is the radius of the circle
For a circle with a radius (r) of 4 units, we can substitute the value into the formula:
- C = 2 × π × 4
- C = 8π
Now, if we want a numerical approximation, we can multiply:
- C ≈ 8 × 3.14159
- C ≈ 25.13272
Thus, the circumference of the circle is approximately 25.13 units.
This means that if you were to walk around the edge of a circle with a radius of 4, you would cover about 25.13 units of distance!