How to get the value of pi = 3.142 by yourself

How to get the value of pi=3.142 by yourself

The value of pi is not a rational number because 3.142 is just an approximate value and if we were to start writing it down, we would exhaust all the papers we have in this world. Therefore, the value of pi cannot be expressed in terms of a ratio or fraction, although some people use 22/7 but this is still not the approximate value of pi. Then, how do we determine the value of mathematical constant, pi?

Reasons why minus times minus equals to plus

Reasons why minus times minus equals to plus

Have you ever wonder why we accept, in mathematics, that negative of negative gives positive sign(that is, negative times negative equals to positive)? I guessed you might have asked yourself this interesting question. Here are some reasons why we accept negative of negative to  be positive: