Question
what is the perimeter of a circle with a radius of 7.1 mm
Answers
GPT-4o mini
The perimeter of a circle, also known as the circumference, can be calculated using the formula:
\[
C = 2\pi r
\]
where \( C \) is the circumference and \( r \) is the radius of the circle.
Given that the radius \( r \) is 7.1 mm, we can substitute that into the formula:
\[
C = 2 \pi (7.1)
\]
Calculating this:
\[
C \approx 2 \times 3.14159 \times 7.1 \approx 44.6 \text{ mm}
\]
So, the perimeter (circumference) of the circle is approximately **44.6 mm**.
\[
C = 2\pi r
\]
where \( C \) is the circumference and \( r \) is the radius of the circle.
Given that the radius \( r \) is 7.1 mm, we can substitute that into the formula:
\[
C = 2 \pi (7.1)
\]
Calculating this:
\[
C \approx 2 \times 3.14159 \times 7.1 \approx 44.6 \text{ mm}
\]
So, the perimeter (circumference) of the circle is approximately **44.6 mm**.