Answer:
Explanation:
The formula for the circumference of a circle is 2 * π * r, where r is the radius of the circle.
Given that the radius of the circle is 13 millimeters, the circumference of the circle is:
2 * π * 13 = 26 * π millimeters
Since the value of π is approximately 3.14, the approximate circumference of the circle is:
26 * 3.14 = 81.64 millimeters.