Question

How to find the circumference with a radius​

Answer 1

the circumference is pi*diameter. diameter is radius*2, and so (radius*2)*pi is the circumference

Answer 2

The perimeter or circumference of the circle can be found using the equation C=2π(r), where r= the radius of the circle. Since we have two semi-circles we can find the circumference of one whole circle with a radius of 4, which would be 8π.