Pi is 3.1415927... and so on, though 3.14 is usually used. If greater accuracy is wanted, 3.146 is used.
2*pi*radius of the circle or diameter*pi where pi = 3.1416 or 22/7 and is usually rounded to 3.14.
While many theorize that the concept of pi has existed since the Ancient Egyptian Empire, the first 'modern' mathematician to calculate pi with any large degree of accuracy (and record his work) was Archimedes of Ancient Greece.
Use the Taylor series for pi, but include more terms. pi = 4(1/1 - 1/3 + 1/5 - 1/7 + 1/9 - ...) However, this converges very slowly. You can search on Google for other representations of pi.
Pi rounded to the nearest whole number is 3.
It is: 3.1415927 is the value of pi when rounded to 7 decimal place
3.14159265
pi in fractional form is calculated by dividing the circumference of any circle by its diameter. The accuracy of pi depends on the accuracy on the measurements taken.
1/4 pi to find the degree in terms of pi, divide the degree by 180 in this example, 45 / 180 = 1/4
9.3 pi = 29.2168 (rounded)
442 pi = 1,388.584 (rounded)
(16 pi)2 = 2,526.619 (rounded) 16 (pi)2 = 157.914 (rounded)