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Math Help - problem solving

  1. #1
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    problem solving

    hey guys so im stuck again

    the question is

    A square has an area of 400cm2
    what is the length of each side?

    i know its pretty easy but im sort of clueless, thanks for any help, and i apologize if im in the wrong forum
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  2. #2
    ixo
    ixo is offline
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    A=x^2

    Area is generally: A=l \cdot w. But since you know its a square its A=(w \cdot w) or A=(l \cdot l), whichever you prefer. Then you put the numbers you know in the equation.

    400=x^2 then remove the ^2, which is called "squared" for a reason. Square root..

    \sqrt{400}=x I'm sure you can do the rest.
    Last edited by ixo; February 17th 2009 at 09:31 PM.
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