Rational
The square root of (any number that isn't a perfect square) is irrational.
You cannot. The cosine of 30 degrees is an irrational number.
Because it can't be expressed as a fraction
An irrational number.
No because the square root of 900 is 30 which is a rational number
No. The sum of an irrational number and any other [real] number is irrational.
The sum of a rational and irrational number must be an irrational number.
irrational
No, 3.56 is not an irrational number. 3.56 is rational.
rational * irrational = irrational.
-Pi is irrational, because it does not terminate or repeat. Whenever you multiply an irrational number by a rational number (-1), the result is an irrational number.