To check if your number is a square number, draw little dots. like, for 4 it will 2 dots by 2 dots. if this doesn't work equally, it is not a square number.
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You take the square root of the number. If it is a perfect square, this will be a whole number. If it is not, it isn't a perfect square.
What is the formula to determine the number of triangles in a given square of forty-four triangles?
Because the square root of it is an irrational number
To get the original number, multiply the square root of the number by itself.
If it can't be expressed as a fraction then it is an irrational number