Question

can you proof that pi is an irrational number

Answer 1

Johann Heinrich Lambert proved that the number π (pi) is irrational: that is, it cannot be expressed as a fraction a/b, where a is an integer and b is a non-zero integer.

Answer 2

yes, π is a irrational no....

π = 22/7➡The popular approximation of 22/7 = 3.1428571428571... is close but not accurate. 

It's a non-terminating and non-repeating number .....
$<b><i><u>And as we know that non-terminating and Non-repeating numbers are categorised into irrational numbers .. So it's clear that π is a irrational number </b></i></u>$
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hope it helps you