# What is the square root of 2?

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Square root 2 is an irrational number with an approximate value of 1.414213562373095... without ending. Irrational numbers are those that cannot be written in a fraction formĀ unless an estimated value is used.

It is usually written as a square root and input into a calculator as square root 2. Answers, particularly in trigonometry leave square root 2 in this form (surd form.)

**Square root 2 is an irrational number with an approximate value of 1.414213562373095.**