What is the approximate value of pi?

2 Answers

plz refer explanation

Explanation:

the approximate value of pi (π) is 3.14159265359 or 22/7.

Although it is generally used as 22/7 or 3.14 or 3.1416,

the most accurate fraction equivalent to pi is 355/113.

Sep 4, 2017

See explanation...

Explanation:

The Chinese mathematician Zu Chongzhi (AD 420-500) calculated approximations to pi using counting rods. He was able to calculate that:

3.1415926 < pi < 3.1415927

He identified two rational approximations to pi, namely:

22/7 = 3.bar(142857)

355/113 ~~ 3.1415929

Nowadays we tend to use the following approximations:

  • 3 for a quick rough and ready estimation.

  • 3.14 or 22/7 for calculations for simple practical use.

  • 3.1415926536 or whatever accuracy your calculator gives you.

I occasionally find it useful to use pi ~~ sqrt(10) ~~ 3.162.