Circumference of a circle with radius of 4
Understand the Problem
The question is asking how to calculate the circumference of a circle given its radius, which is 4. The circumference can be found using the formula C = 2πr, where r is the radius.
Answer
$C = 8\pi$ or approximately $25.12$.
Answer for screen readers
The circumference of the circle is $C = 8\pi$ or approximately $25.12$.
Steps to Solve
- Identify the values needed for the formula
In our case, we need to identify the radius $r$. Here, $r = 4$.
- Substitute the radius into the formula
Using the formula for circumference $C = 2\pi r$, we substitute the value of $r$ we identified:
$$ C = 2\pi(4) $$
- Perform the multiplication
Next, we calculate the value:
$$ C = 8\pi $$
- Provide the numerical approximation (if needed)
If you need a numerical answer, you can approximate $\pi \approx 3.14$:
$$ C \approx 8 \times 3.14 = 25.12 $$
The circumference of the circle is $C = 8\pi$ or approximately $25.12$.
More Information
The formula for circumference is derived from the relationship between the diameter and radius of a circle. The circumference represents the total distance around the circle.
Tips
- Forgetting to multiply by 2 when using the formula.
- Using the diameter instead of radius; ensure you use the correct value.
AI-generated content may contain errors. Please verify critical information
