**Here’s a quick fun Pi Day Maths activity to use on Pi Day this year as part of the ways you can explore and celebrate maths in your school. This one is particularly good as a starter… **

## We have plenty more calendar based Maths activities to try with your KS2 class, download this free 20 pack of topical Maths activities and let the Maths fun begin!

#### Pi Day Maths Activity

1. Carefully cut out the circles below, then fold them in half and in half again to find the centre point.

2. Using a ruler and a piece of string, measure the radius, diameter and circumference of your circles (round your answers to the nearest centimetre)

3. Fill in the table below and then answer these questions:

- Look at the radius and diameter, what do you notice?
- Now look at the diameter and circumference, do you notice anything?
- If a circle has a diameter of 56cm:

a) What would be the radius?

b) Can you estimate what the circumference would be?

If you liked this, you’ll love our topical investigations blog, full of ways that fun Maths investigations KS2 can improve problem solving and reasoning in Maths (plus a tonne of activities!)