If you don't have a calculator you can explain your thought process for estimation. The closest perfect squares are 4 and 9 so sqrt(4) = 2 and sqrt(9) = 3 so sqrt(7) is in between 2 and 3.
1
Sigiloso
22 de jul. de 2011
Plug it into a calculator you get 2.645751311 but know that the decimal continues forever so it is not exactly the square root of seven.