Final answer:
The perimeter of the circle with a radius of 13 mm is approximately 81.64 mm.
Step-by-step explanation:
The perimeter of a circle can be found using the formula P = 2πr, where P is the perimeter and r is the radius. In this case, the radius of the circle is 13 mm. Plugging in this value, we get P = 2π(13) = 26π mm. Using an approximation of π as 3.14, we can calculate the perimeter as P ≈ 26(3.14) = 81.64 mm.