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pi is an irrational number because it cannot be expressed as a ratio of two integers. In fact, it is a transcendental number, but that is not relevant here.

3.14 is a rational approximation to pi. It is not equal to pi.

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Q: Why is pi irrational and 3.14 is rational?
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Related questions

Is π(pi) rational or irrational?


Is 3.14 rational and irrational at the same time?

No number can be rational and irrational at the same time. 3.14 is the ratio of 314:100 and so is rational. HOWEVER, 3.14 is also a common approximation for pi, which is an irrational number. All irrational numbers have infinite, non-recurring decimals and so are often approximated by rationals.

Can the quotient of two irrational numbers be rational?

Yes. 2*pi is irrational, pi is irrational, but their quotient is 2pi/pi = 2: not only rational, but integer.

Is pi plus pi a rational or irrational number?

It is irrational, just like pi

Why is pi rational?

Pi is not rational it is irrational because it does not stop or repeat

Why is pi a rational number?

Pi is irrational.

Why the area of a circle with a rational radius must be an irrational number?

It the radius is r then the area is pi*r*r - which is pi times a rational number. pi is an irrational number, so the multiple of pi and a rational number is irrational.

Is the square of pi a rational or irrational nuymber?

The square of pi is an irrational number.

Is 0.3 pi rational?

No, it is not.

Is 1 - pi rational or irrational?

It is an irrational number

Is negative pi rational or irrational?

-Pi is irrational, because it does not terminate or repeat. Whenever you multiply an irrational number by a rational number (-1), the result is an irrational number.

Is pi divided by 2 rational or irrational?

If a numerator and/or denominator in a fraction is irrational, the entire fraction is irrational. Since pi is irrational, pi divided by two is also irrational.