Looking to find the square root of 90? Our calculator can help! Simply enter 90, and you'll get the square root instantly. It's a quick and easy way to solve your square root problems.

Is 90 a Perfect Square?

When the square root of a number is a whole number, it's called a perfect square. Perfect squares are useful in many fields, like woodworking and even in advanced subjects like physics and astronomy.

Take the number 90 as an example. Its square root is 9.487, which isn't a whole number. This means 90 isn't a perfect square.

If you're interested in perfect square numbers, we have a list of the first 1,000 perfect squares.

Is Square Root of 90 a Rational or Irrational Number?

Sometimes, with numbers like 90, you might wonder if it's a rational or irrational number. Rational numbers can be written as fractions, while irrational numbers cannot.

A simple way to tell is to check if the number is a perfect square. If it is, then it's rational. If it's not a perfect square, then it's irrational.

Since 90 isn't a perfect square, it is not a rational number.

90 is an irrational number.