Math: Finding the Approximate of π

Posted On August 29, 2012

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On Monday, 27th August 2012, we did an activity on finding the approximate value of π from the known circumference and diameter of a circle.


A circle is a set of points that are equidistant from the center point O. The distance r from the center is called the radius, and. Twice the radius is known as the diameter d = 2 r.

Because we know that π is a the ratio of the circumference to the diameter of a circle, we did this activity on finding the π, by finding the circumference of an object using a string, and find the diameter using a ruler.

Here is the result of our findings:

We have known that π = 22/7, before we did this activity. And from the result of this activity, we found out π, which is the ratio of circumference and the diameter, are close to 22/7.

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