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    (Original post by Ano123)
    Which is 4.47?
    Yeah it get like 19.98 but then I have to round it up
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    (Original post by Ano123)
     \sqrt {20} =4.47 ?. that means that  \sqrt{20} =\frac{447}{100} , meaning that  \sqrt{20} is not irrational after all? I think I'm going to have to have a lie down.
    You could be nicer about it.

    (Original post by zXcodeXz)
    No it's basically what same number times together to get 20
    He's just trying to make the point that \sqrt{20} \approx 4.47, and not =; but that's not something you need to worry about right now, to be honest.
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    (Original post by zXcodeXz)
    Yeah it get like 19.98 but then I have to round it up
    That's what I'm saying mate, I was joking. In maths we try and work with exact answers.
    If area is 20 then side length is  \sqrt{20}=2\sqrt 5 .
    Volume is side length cubed  =(2\sqrt{5})^3 = 40\sqrt 5 .None of this rounding business.
    I'm not making fun of you, I'm just having some maths banter.
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    (Original post by Zacken)
    You could be nicer about it.



    He's just trying to make the point that \sqrt{20} \approx 4.47, and not =; but that's not something you need to worry about right now, to be honest.
    I know but I'm a banter machine so I just can't control myself.
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    (Original post by Zacken)
    You could be nicer about it.



    He's just trying to make the point that \sqrt{20} \approx 4.47, and not =; but that's not something you need to worry about right now, to be honest.
    Oh ok to be honest I've had enough looking stupid by maths I'm going for a level maths
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    (Original post by zXcodeXz)
    Oh ok to be honest I've had enough looking stupid by maths I'm going for a level maths
    You don't look stupid at all.
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    (Original post by Ano123)
    You don't look stupid at all.
    One reason would be enough of how I don't look stupid
 
 
 
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