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… 

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?

Looking for more? Try these event based ks2 maths problem solving investigations, our favourite fun maths lessons or more fun KS1 and KS2 maths activities.

Do you have pupils who need extra support in maths?
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Since 2013 we’ve helped over 150,000 primary and secondary school pupils become more confident, able mathematicians. Learn more or request a personalised quote for your school to speak to us about your school’s needs and how we can help.