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Math Help - someone please prove this wrong

  1. #1
    Junior Member
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    Question someone please prove this wrong

    'in an octagon, all the interior angles are equal'
    'an octagon is regular'
    is the link between these statements 'if and only if'? i thought that was obvious until it turned out i was wrong
    why is that??
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  2. #2
    MHF Contributor
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    Hello the kopite
    Quote Originally Posted by the kopite View Post
    'in an octagon, all the interior angles are equal'
    'an octagon is regular'
    is the link between these statements 'if and only if'? i thought that was obvious until it turned out i was wrong
    why is that??
    Because the sides don't all have to be the same length - and the angles can still all be equal.

    See diagram.

    Get the idea?

    Grandad
    Attached Thumbnails Attached Thumbnails someone please prove this wrong-untitled.jpg  
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