what is learn from (pi)

I thing learning some new in life for (pi) through the activity, I will talk about these in flowing points

Background about (pi)

The number π is the ratio of the circumference of a circle to the diameter.
The value of π is approximately 3.14
The diameter of a circle is twice the radius.
Given the diameter or radius of a circle, we can find the circumference.
We can also find the diameter (and radius) of a circle given the circumference.
The formulas for diameter and circumference of a circle are listed below.
We round π to 3.14 in order to simplify our calculations.

D=2*r
C= π*d


How to Measure the diameter of the circle

The distance around a circle is called the circumference. The distance across a circle through the center is called the diameter. π Is the ratio of the circumference of a circle to the diameter? Thus, for any circle, if you divide the circumference by the diameter, you get a value close to . This relationship is expressed in the following formula:

c/d= π

How to calculate the value of (pi)?

This is simple application for (pi)
Example 1:

The radius of a circle is 2 inches. What is the diameter?
Solution:

d=2 * r
d = 2 · (2 in)
d= 4 in

Example 2:

The diameter of a circle is 3 centimeters. What is the circumference?
Solution:
C=pi * d
C= 3.14 · (3 cm)
C= 9.42 cm