which formula is used to find the circumference of a circle when the radius is given c = 2R c equals 2d she equals r2 c equals r
The formula used to find the circumference of a circle when the radius is given is:
c = 2πr
where c is the circumference, r is the radius and π is the mathematical constant pi (approximately equal to 3.14159).
None of the options you provided are correct.