#1**+10 **

No, it is either 2pi*r, or pi*d, area is pi*r^2.

Guest Apr 8, 2016

edited by
Guest
Apr 8, 2016

edited by Guest Apr 8, 2016

edited by Guest Apr 8, 2016

#2**+5 **

No....you have the area formula for a circle

The circumference is : 2 * pi * r or, as sometimes written : pi * diameter

CPhill
Apr 8, 2016

#3**+10 **

Actually, the formula for the circumference of a circle is 2(pi)(r).

It is easy to get this and the formula for calculating the area of a circle, pi(r)^2, confused since they use the same numbers.

Anonymous4338
Apr 8, 2016