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If the diameter of a circle is 12 inches, what is the area, circumference and the radius?

1 Answer
May 28, 2015

#R.= 6#, #C. ~~ 38# and #A. ~~ 113#.

First you need to find the radius, the key term to find the radius is #diameter = 2*radius#; therefore the radius #r# is #12/2 = 6# inches.

To find the area of a circle, you need to use the formula #A = pi*r^2#; therefore the area #A# is #pi*6^2 ~~ 113# square inches.

To find the circumference of a circle, you will use the formula #C = 2*pi*r#; therefore the circumference #C# is #2*pi*6 ~~ 38# inches.