An irrational quantity is a non-terminating, non-repeating decimal. As an illustration, the sq. root of two is an irrational quantity as a result of its decimal growth by no means ends and by no means settles right into a repeating sample.
Irrational numbers are important in varied fields, together with arithmetic and science. They permit for exact measurements and calculations in areas resembling geometry, trigonometry, calculus, and physics.