A very good morning to our principal maam, our vice principal maam, all our favourite
teachers and all my friends in the audience.
Do you all know what we are celebra ng today ?
We are celebra ng pi approxima on day!
Today on this special occasion, we are celebra ng a special day that’s all about a mysterious
number that might seem boring at first, but trust me, its actually really cool.
You might be thinking “ugh, math ? no thanks!”, but hear me out, pi is more than just a
bunch of numbers. It’s a special code that unlocks the secrets of the universe.
Pi approxima on day is celebrated on July 22, as the date 22/7 marks the approximate value
of pi, and also the 22nd day of the 7th month.
Now who can tell me, who first discovered pi ?
Our own legendary mathema cian, Aryabhata, in his book, Aryabha a, gave an approximate
value of pi as the circumference-diameter ra o, namely 3.1416 ll the 4th digit. In the year
499 CE. Aryabhata correctly concluded the value of pi upto two decimal places, ie. 3.14.
Madhava of Sangamagrama contributed in finding the value of pi correctly upto 11 digits.
ie. 3.14159265359
Indian mathema cians, Madhava and Aryabhata mde very significant contribu ons in
finding the exact value of pi.
Facts:-
-Pi doesn’t have an exact value as it as an irra onal number.
-The best approxima on of pi, yet, is its calcula on upto 202 trillion decimal places, that’s
calculated using a supercomputer.
Do you know how many zeros are there in a 100 trillion ? 14 zeros!
-Pi is a mystery as its decimal representa on is infinite, non repea ng and seemingly chao c.
-According to the Guinness book of world records, the current record for ‘most recited digits
of pi’ is held by Suresh Kumar Sharma, who recited an incredible 70,030 digits of pi in
17 hours 14 minutes.
-Anything involving a circle, sphere or a curve is bound to have pi, or use pi to understand.
Applica ons of pi are done on a daily basis, we need pi everywhere.
Pi is used in various fields such as engineering, physics, industries and even in something as
simple as cooking and baking.
a.1 (semicircular bridge) Suppose you want to construct an arched bridge similar to the one
showed here (in the presena on). To determine how much you want your bridge to be
arched, you can use the formula for the circumference of a circle, since the bridge has a
semi-circular shape.
a.2 (industries) In large scale industries, gigan c cylinders are required in refinery
equipment. In order to find the dimensions of this cylinder, the three formulae which are
displayed on the screen can be used. These formulae can also be applied to find the
dimensions of big paper rolls produced in paper factories.
a.3 (baking/cooking) “Have you ever made a cake or a pizza at home ?” … ,
“have you ever no ced how they are perfectly circular in shape ? this is because the pans
used for baking are constructed by using the formula for the area of circle to get the
dimensions of a perfect circle which gives the shape to your food.”
Pi is like a puzzle piece that helps us understand the world around us. And the best part? It's
s ll a mystery that scien sts and mathema cians are s ll trying to solve.
So, even if you think you don't like math, I encourage you to embrace the awesomeness of pi
today. Who knows, you might just discover a passion for math. So, let's explore the wonders
of pi together and unlock the secrets of the universe, one digit at a me!
-Paree -Nishtha
