Because is is irrational, it cannot be expressed as a fraction. Because it is transcendental, it cannot be expressed as the root of a polynomial (like square roots can). In other words, without making up a symbol or a name specifically for pi, there is no simple way to express its exact value.
The reason the symbol was chosen is because pi is the greek version of the letter p. Like "p", pi is the first letter of the greek word for "perimeter". A circumference can be thought of as the "perimeter" of a circle, so the letter pi was chosen.
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"Pi" is not an equation - it is a constant. Pi is irrational, that is, it cannot be expressed as a ratio of constants, but it can be truncated for common use (approximately 3.1415). Pi is given by the circumference of a circle divided by the circle's diameter: Pi = C / d
A coefficient is a numerical or constant quantity placed before and multiplying the variable in an algebraic expression. A coefficient must be a number or a symbol for a constant number. This includes pi and e as coefficients.2x=6(pi)x=44(x+2)=19
what Englishman introduced the pi symbol, and in what year
No. the symbol for pi stems off of the Greek letter pi, probably due to the fact that the discoverer of pi was Greek.
Pythagoras was the 1st person who used the pi symbol first