What is the square root of 1.8?

1 Answer
Mar 30, 2018

(3*sqrt(5))/5

Explanation:

1) Put it in fractions
1.8 = 9/5

2) Square root the fraction
sqrt(9/5)

3) Take out the perfect square
3/sqrt(5)

4) Rationalise
3/sqrt(5)*sqrt(5)/sqrt(5) = (3*sqrt(5))/5