Who discovered circumference of circle?
Archimedes of Syracuse
Who discovered the relationship between circumference and diameter?
Archimedes
What is pi * D * L?
piD = length, the circumference of the cylinder. L = length, the length. piDL = length*length = area = area of the cylinder.
Is pi really infinite?
Pi is an irrational number, which means that it is a real number that cannot be expressed by a simple fraction. That’s because pi is what mathematicians call an “infinite decimal” — after the decimal point, the digits go on forever and ever.
Is pie the same as 22 7?
The simplest approximation for Pi is just 3. In the past, many math books listed Pi as 22/7. Again, this is just an approximation but it is better than the value of 3 (actually 22/7 is closer to Pi than just writing 3.14).
How far off is 22 7 from PI?
The purpose of the proof is not primarily to convince its readers that 227 (or 317) is indeed bigger than π; systematic methods of computing the value of π exist. If one knows that π is approximately 3.14159, then it trivially follows that π < 227, which is approximately 3.142857.
What is a repeating decimal called?
A repeating decimal, also called a recurring decimal, is a number whose decimal representation eventually becomes periodic (i.e., the same sequence of digits repeats indefinitely).
How do you indicate a repeating decimal?
A decimal number with a digit (or group of digits) that repeats forever. The part that repeats can also be shown by placing dots over the first and last digits of the repeating pattern, or by a line over the pattern. Also called a “Repeating Decimal”.
Is 2/5 a repeating or terminating decimal?
If the prime factorization of the denominator of a fraction has only factors of 2 and factors of 5, the decimal expression terminates. If there is any prime factor in the denominator other than 2 or 5, then the decimal expression repeats.
What is 2/3 as a repeating decimal?
0.66666