Celebrate Pi Day 2016 with this quick KS2 Maths activity
Here's a quick fun activity to use on Pi Day 2016 Monday 14^{th }March (03.14 in the US calendar) 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?