The area of a circle is 16 pi cm2. What is the circle's circumference?
1 Answer
Mar 3, 2018
Explanation:
#"area of a circle "=pir^2larr" r is the radius"#
#"area is given as "16pi#
#rArrpir^2=16pilarr" divide both sides by "pi#
#rArrr^2=16rArrr=4#
#"circumference "=2pir=2pixx4=8pi" cm"#
