Pansy Puff wrote:
Deebank wrote:22/7 is pi!!!!!!
No it isn't!!
A number that cannot
be expressed as a fraction is called an irrational
number. Pi is one of these numbers.
An irrational number is a number that does not recur in a decimal pattern – like pi where the decimal places go on forever in no set order or pattern
To approximate we use values of pi which include 22/7, 3.1, 3.14, 3.1412 depending on the level of accuracy required.
So an approximate value of pi 22/7, as stated by your teacher, is correct
It follows that a number that can
be expressed as a fraction recurs in a decimal pattern and is called a rational
Eg 0.333..= 1/3
0.173173173... = 173/999
0.166666666… = 1/6
This includes terminating decimals that ‘stop’
Eg 0.1 = 0.10000000… = 1/10
For the record an integer (whole number including zero) is a rational number because they can also be expressed as a fraction
Eg 6 = 6/1
5 = 30/6
0 = 0/9