# Math : Finding the Approximate of π

Here it is, my first post about Math.

On 27th August 2012, we were having an activity on finding the value of π from the known circumference and a 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.**Related word to circle :

**arc:** a curved line that is part of the circumference of a circle

**chord:** a line segment within a circle that touches 2 points on the circle.

**circumference:** the distance around the circle.

**diameter:** the longest distance from one end of a circle to the other.

**pi ():** A number, 3.141592…, equal to (the circumference) / (the diameter) of any circle.

**radius:** distance from center of circle to any point on it.

**sector:** is like a slice of pie (a circle wedge).

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.

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