What is the circumference of a 20 inch circle?
Understand the Problem
The question is asking for the calculation of the circumference of a circle with a diameter of 20 inches. To find the circumference, we can use the formula C = πd, where 'd' is the diameter.
Answer
$62.8$ inches
Answer for screen readers
The circumference of the circle is approximately $62.8$ inches.
Steps to Solve
- Identify the formula for circumference
To calculate the circumference of a circle, we use the formula:
$$ C = \pi d $$
where $C$ is the circumference and $d$ is the diameter.
- Substitute the diameter into the formula
Here, the diameter $d$ is given as 20 inches. Substitute this value into the formula:
$$ C = \pi \times 20 $$
- Calculate the circumference
Now, using an approximate value for $\pi \approx 3.14$, you can calculate the circumference:
$$ C \approx 3.14 \times 20 $$
- Simplify to find the result
Perform the multiplication:
$$ C \approx 62.8 $$
The circumference of the circle is approximately $62.8$ inches.
More Information
The circumference of a circle is important in many real-world applications, including construction and manufacturing. Knowing how to calculate it can help in designing circular objects or in tasks involving perimeters.
Tips
- Misunderstanding the formula: Always remember to use the correct formula $C = \pi d$. Forgetting to use $\pi$ can lead to incorrect results.
- Using the radius instead of the diameter: Ensure you are using the diameter, as the formula requires it directly.
