"...although many mathematicians have tried to find it, no repeating pattern for pi has been discovered..." (http://mathforum.org/dr.math/faq/faq.pi.html).
you find the surface area of a circle by first finding the area of the circles/ two ends. you do this by multiplying the diameter by pi then multiply by two, that is both ends put together then you find the area of the flat part by finding out the circumference of the circle ends, then multiply that by the height of the cylinder. circumference= pi times the diameter then add all your calculation together, and you have the surface area of your cylinder :)
This is an easy calculation to do. Simply multiply the diameter by Pi (about 3.1416).15mm x 3.1416 = 47.124 mm circumference.
Every person who has ever used the "value" of pi in a calculation has used an approximation.
Archimedes
The ancient Babylonians from around 1700 BC used pi = 3.125. The name of the person who calculated that value was not recorded.
The first to find the value in pi were the Babylonians and Egyptians.
3.141592654 rounded by the calculator
The ancient Babylonians were one of the first who gave it a value of about 3 but even today we do not know the exact value of pi only that a circle's circumference dividedby its diameter is equal to pi which is an irrational number because it cannot be expressed as a fraction.
"...although many mathematicians have tried to find it, no repeating pattern for pi has been discovered..." (http://mathforum.org/dr.math/faq/faq.pi.html).
pi is currently at 4 million digits
You take the circumference of a circle and divide it by the diameter.
It is March 14th which are the first 3 digits of pi as 3.14
While there is no fraction form for pi, 22/7 is an approximation of pi that can be used for a rough calculation .
hnheb a4ety4b
einstein
You can find the first million at: http://www.eveandersson.com/pi/digits/1000000