The formula of 2 π R is to find the circumference of a circle. How to find the circumference of a semicircle It's a semicircle
It's "pie" R 2R. Use half of the circle plus the diameter, split method. I can't type the sign of the circle law, sorry
The circumference of a circle is 2 π R. what is the circumference of a semicircle
πr+2r