Question

What is the approximate circumference of the semicircle ​

Answer 1

Hello from MrBillDoesMath!

Answer:

39.3

Discussion:

Circumference of full circle =  2 Pi R = 2 Pi ( 12.5). So circumference of semicircle is  (1/2) ( 2 Pi * 12.5) = Pi * 12.5. Using 3.14 for Pi, Pi * 12.5 is  39.3

Thank you,

MrB