Circumference Math Example 3

Follow the full solution, then compare it with the other examples linked below.

easy

Find the circumference of a circle with diameter

14

cm. Leave your answer in terms of

\pi

Answer

C = 14\pi \text{ cm}

When given the diameter directly, the simpler formula

C = \pi d

avoids the extra step of halving to find the radius.

About Circumference

The total distance around the outside of a circle; equal to $\pi$ times the diameter or $2\pi r$ .

Find the circumference of a circle with radius [formula] cm. Leave your answer in terms of [formula]

A circular track has a circumference of [formula] m. Find the radius of the track to the nearest met

A bicycle wheel has diameter [formula] cm. How far does it travel in [formula] complete rotations? U