# Let Them Eat Pie: A Quick Pi Day Maths Activity

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…

KS2 Topical Maths Problems for Spring Term 2017

20 Maths investigations linked to calendar dates, designed to develop reasoning and problem solving in your pupils

#### 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?

##### David Leighton
Third Space Learning
Content Team
A former secondary teacher, David writes blog posts and Maths resources as part of the content team.

#### KS2 Topical Maths Problems for Spring Term 2017

20 Maths investigations linked to calendar dates, designed to develop reasoning and problem solving in your pupils