what is the answer of a square with an area of 20 ?what is the side length?

What is the area of a square? It is side X itself=(side)^2

But you have the area, which is 20, right? So now you have to do the opposite of squaring the side, which means you have to take the square root of 20. Use the calculator to do that. First you enter 20, then press the  √x  key, and then the = sign. That should give you your answer. Your answer should be 4.4............etc. OK? Try it.