Well, considering 100 * 100 is clearly more than 4 times 2300 its more an error of my basic mulitplication than my method of estimating squares. Was just focused on something else at the time of writing (as indicated by the spelling). Considering that a square root by definition is the side of the square described, visualising it sure doesn't hurt.
If I tried again I'd say 100* 100 = 10,000, 1010 = 100, 50 50 = 2500, so that going to be pretty close. 48 is pretty close to 50.
If I tried again I'd say 100* 100 = 10,000, 1010 = 100, 50 50 = 2500, so that going to be pretty close. 48 is pretty close to 50.