Circumference of a Circle | Mills Maths Tools

Circumference of a Circle

The circle

The drawn circle never changes size — only the measurement written on it. That is the point: the answer comes out the same either way.

Display

Predict first Show the measurements Running count Unrolled number line

How many diameters fit around the circumference?

Step 1

Space or → for the next step, ← to go back, T to test a number, R for a new circle.