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    Yeh, so I went to uni and did a Maths degree, but have been in work for the past 3 years and I cannot believe how rusty I have gotten, so don't judge haha.

    I just can't seem to work out the attached highlighted and am convinced it is a mistake.

    I get x/y = root 2, not one over.

    Is this a small mistake on wiki?
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    • Thread Starter
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    You know what, it has to be root 2 with x being the longer side. So it is a typo.

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    Yes it is an error. They call the long one x but arrive at xroot 2=y which means that y is longer than x which is a contradiction of their original definition of x.
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    you get x2/y2 = 2 when you cross multiply.

    .... they have made a mistake
 
 
 
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