Question

If the hockey puck is 7.6 centimeters in diameter what is the circumference of the puck

Answer 1

c=2*pi*r or c=pi*d
c=7.6*pi
c=23.88

Answer 2

Divide 7.6 by 2 to find the length of the radius, and then plug radius in for "r" in the formula 
2(pi)r^2