Square Root of 20
The square root of 20 is approximately 4.472136, or exactly 2√5 in simplified radical form. No, 20 is not a perfect square. Its square root is irrational and never terminates or repeats as a decimal.
√20
4.472136
Simplified Radical Form
2√5
Perfect Square
No
√20 is irrational — its decimal form (4.472136) never terminates or repeats. The simplified radical form (2√5) is the exact value.
Frequently Asked Questions
What is the square root of 20?
The square root of 20 is approximately 4.472136, or exactly 2√5 in simplified radical form.
Is 20 a perfect square?
No, 20 is not a perfect square. Its square root is irrational and never terminates or repeats as a decimal.
More Number Theory
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