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    a paralelogram has sides of 7cm and 11cm and angles of 78* and 108*. calculate the length of the longest diagonal.

    I know that its all about triganometry adn that, and sine and cosine rukles. but how the hell do i do it???? you have also got to include a diagram!!!!!!
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    (Original post by ianbradshaw2002)
    a paralelogram has sides of 7cm and 11cm and angles of 78* and 108*. calculate the length of the longest diagonal.

    I know that its all about triganometry adn that, and sine and cosine rukles. but how the hell do i do it???? you have also got to include a diagram!!!!!!
    The angles are wrong, all sngles should add upto 360* in a 4 sided shape and in a parallelogram opposing angles are the same.

    2*78 + 2*108 = 372

    that's 12 degrees out.
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    this is what it says, exactly.

    A parallelogram has sides 7cm and 11cm and angles of 72* and 108*.
    Calculate the length of the longer diagonal of the parrallelogram/
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    (Original post by ianbradshaw2002)
    this is what it says, exactly.

    A parallelogram has sides 7cm and 11cm and angles of 72* and 108*.
    Calculate the length of the longer diagonal of the parrallelogram/
    In a quadrilateral, the angles must add up to 360 degrees.
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    thanx i kinda already know that.
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    (Original post by ianbradshaw2002)
    thanx i kinda already know that.
    A parralelogram is a quadrilateral though.
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    yeh,............................ ................................ ................................ ................................ ..well done
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    So what he's saying is- those angles don't add up to 360, so there is a problem? Do you get this?
    If you're going to take that tone with people who are trying to help you then you might as well leave.
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    (Original post by hitchhiker_13)
    So what he's saying it, those angles don't add up to 360, so there is a problem? Do you get this?
    If you're going to take that tone with people who are trying to help you then you might as well leave.
    Indeed.
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    Basically, the question's wrong.
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    next time you want to ask a ****in question mate, get it right in the first place, alright?

    Don't come on here shoutin the odds, you sound like a very intellectual person.
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    Not.
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    (Original post by ianbradshaw2002)
    this is what it says, exactly.

    A parallelogram has sides 7cm and 11cm and angles of 72* and 108*.
    Calculate the length of the longer diagonal of the parrallelogram/

    You said 78 degrees at the start, therefore your fault.
 
 
 

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