Question:
WHY Pi is regarded as an irrational number though it is expressed as 22/7
Answer:
A number is rational if it can be expressed in the form of p/q, where p and q are integers and q is non-zero. If it cannot, it is irrational.
π can be represented as the ratio of the circumference to the diameter of the circle, but it cannot be expressed as the ratio of two integers.
22/7 does not equal π, it is merely an approximation.
It dates back to Archimedes as the lower-bound value, the upper-bound being 223/71.
Other popular ancient approx values of π include square-root of 10 and 25/8.
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