Question 11975
While a diagram is useful for many siuations, in this case, all you really needed to say was...Find the circumference of a circle with a diameter of 4 inches.
 By the way, all circles are round!

The circumference of a circle is given by the formula: {{{C = (pi)D}}} where D is the length of the diameter (4 inches) (the straight line through the center and terminting on the edges of the circle) and {{{(pi) = 3.14}}} approximately.

{{{C = (pi)(4)}}}
{{{C = (3.14)(4)}}}
{{{C = 12.56}}}

The circumference of the circle is 12.56 inches.