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It is long time since PI was introduced,
(i) Collect circular objects such as , bottle tops, bangles, cups and the like. See the picture below:mugs, bucket covers(ii) Take a tape measure: (ii) Measure the circumference as shown below: (record down every data you obtain) (iii) Measure the diameter as shown below: (record down every data you obtain) (iv) Divide the circumference of each object by its corresponding diameter that is: (Circumference ÷ Diameter) in short
1: He obtained the circumference of the cup 18.85cm and Diameter of the same cup 6cm then he divided 18.85cm by 6cm he got 2: He obtained the circumference of the bangle 39.3cm and Diameter of the same bangle 12.5 cm then he divided 39.3cm by 12.5cm, he got 3: He obtained the circumference of the bottle top 9.4cm and Diameter of the same bottle top 3cm then he divided 9.4cm by 3cm, he got 4: He obtained the circumference of the glass 22cm and Diameter of the same glass 7cm then he divided 22cm divide by 7cm, he got 5: He obtained the circumference of the steering wheel 119.4cm and Diameter of the same steering wheel 38cm then he divided 22cm divide by 7cm, he got If you observe carefully the results of the experiment, you will find that all fell at
PI is approximated to But remember the closer approximation of PI in fraction is ^{22}/_{7}. PI is the ratio of the circumference to the Diameter.^{355}/_{113. }By dedinition:
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