If the radius of the circle above is 12 inches, what is the circumference of the circle?

Question

There is an purple circle and it has a line that goes halfway through it that says 12inches

 

Answer 1

The formula for the circumference of a circle is C = 2πr, so the circumference of this circle can be represented by C = 2π(12).  This simplifies to C = 24π.  If we use 3.14 for π, then C = 24(3.14) = 75.36 inches.