22=4, so no, it's not an irrational number.
Sometimes. eg the irrational number √2 squared is 2 which is rational (2 = 2/1) eg the irrational number √(√2) squared is √2 which is irrational.
20 squared is not an irrational number. 202 = 400.
No. Perfect squares as the squares of the integers, whereas irrational squares as the squares of irrational numbers, but some irrational numbers squared are whole numbers, eg √2 (an irrational number) squared is a whole number.
5 squared is 5*5 is 25. 25 is not an irrational number.
Any number that can't be expressed as a fraction is an irrational number.
No because 7 squared equals 49 which is a rational number but the square root of 7 is an irrational number
The square of any rational number is also rational.
Because it has no number that can be squared to make it.
20 squared is 400 which is a rational number
No because 102 squared is 10404 which is a rational number
Rational.
Rational.