maths

We are trying to find the value of pi measured 4 different circular shapes

Shape	Circumference	Diameter	c/d
1	500mm	196mm	2.801
2	490mm	165mm	2..96
3	320mm	107mm	2.99
4	330mm	70mm	3.66

Average= 2.801+2.96+2.99+3.664
=3.102