Question

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

Answer 1

`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.