The area of a square is 121 square units. What is the length of its sides?
Take the square root of both sides
Errors on this type of question are very common!
The most common mistakes are that people either
The correct operation is to find
Square roots are really not an easy concept to master at first, because of the irony that you can't find the answer until you know what the answer is!
Or put another way, you don't know what to divide by until you know the answer, and you can't find the answer until you know what to divide by!
It is a help to know all the square numbers up to
Recognition is half the battle!
Once you know the common ones by heart, it makes it easier to understanding others.
With a square root question - ask yourself...
"What number, multiplied by ITSELF will give this value?"