main fraction:22/7 most accurate fraction:355/133
very
(Pi) is not an 'infinite number'. It just can't be written exactly with any finite number of digits. But there are plenty of digits available, to make your division as accurate as you want it. You can never get an exact answer, just like you can never write the exact value of (pi), but you can get as close as anyone will ever need to get.
22/7
A = (pi)r2 A = (3.141592654)(2.25) A = 7.068583471 u2 *note* this answer is not completely accurate as pi is a non-terminating number it would perhaps be better to express answer as 2.25pi
main fraction:22/7 most accurate fraction:355/133
The sixteenth decimal place (to the right) of Pi is the number 2. However, Pi to only 11 places to the right of the decimal is accurate for a circle the circumference of the earth to within 1 mm. Pi to 16 places is: 3.1415926535897932
Pi, being irrational, has an endless number of digits to the right of the decimal, as you know. But for almost any application, even basic engineering, a value of 3.1417 is highly accurate.
An INFINITE number. Computers have calculated 'pi' to billions of places and still going. However for everyday school learning pi = 3.14 or pi = 22/7 . For more accurate calculations pi = 3.1416 . This is used in science, technology and engineering.
very
(Pi) is not an 'infinite number'. It just can't be written exactly with any finite number of digits. But there are plenty of digits available, to make your division as accurate as you want it. You can never get an exact answer, just like you can never write the exact value of (pi), but you can get as close as anyone will ever need to get.
The formula for the area of a circle is pi times the radius squared. The number pi is only used in an approximate form, since the decimal expansion of pi is infinitely long and non-repeating. Consequently, all calculations of the area of a circle are also approximate. However, you can be as accurate as you want to be. Pi has been calculated to thousands of decimal places, which is ridiculously more than you would ever need for any practical purpose. In most cases, the approximation of pi as 3.14 is close enough. Your result will be accurate, it just won't be 100% accurate.
22/7
A = (pi)r2 A = (3.141592654)(2.25) A = 7.068583471 u2 *note* this answer is not completely accurate as pi is a non-terminating number it would perhaps be better to express answer as 2.25pi
Because pi is an irrational number (meaning that the numbers after the decimal never end) and the computational power of computers is always increasing the number of digits found in pi will continue to increase and change every day. The number of digits of pi have surpassed one billion (i think, I will try to find a site). They have a supercomputer always on, getting more and more accurate. A guy had a computer on for 7 years and got a billion digits of pi (with an old laptop). However you only really need just over 30 to be accurate enough by any standards.
If you mean the number pi, you can't have a "large amount of pi" or a "small amount of pi" - the number pi will always be the number pi (approximately 3.1416).
the number is that you use for pi is 3.14 the number is that you use for pi is 3.14