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    Can anyone help with this prob?
    Put it on my site for u all.

    http://www.cobsc.co.uk/question.jpg

    Thanks
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    is A a right angle?
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    (Original post by mick665544)
    Can anyone help with this prob?
    Put it on my site for u all.

    http://www.cobsc.co.uk/question.jpg

    Thanks
    I've had too much of a busy day to think, but I know the bottom bit is a trapezium which may come in useful..there again it may not.
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    (Original post by elpaw)
    is A a right angle?
    It doesnt say so, diagram i have says not to scale and doesnt show right angle sign.

    Whole Question is:

    In the triangle ADE
    BC is parallel to DE

    AB = 8cm
    AC = 5cm
    BD = 4cm
    BC = 9cm

    a) work out the length of DE
    b) Work out the length of CE


    Not sure about trapezium rule, dont you have to know the area, would have two unknowns in that equation.
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    (Original post by mick665544)
    It doesnt say so, diagram i have says not to scale and doesnt show right angle sign.

    Whole Question is:

    In the triangle ADE
    BC is parallel to DE

    AB = 8cm
    AC = 5cm
    BD = 4cm
    BC = 9cm

    a) work out the length of DE
    b) Work out the length of CE


    Not sure about trapezium rule, dont you have to know the area, would have two unknowns in that equation.
    ah you haven't put down the length bc. that helps.

    DE = (4+8)/8 * 9 = 13.5cm

    CE = 4/8 * 5 = 2.5 cm
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    (Original post by elpaw)
    ah you haven't put down the length bc. that helps.

    DE = (4+8)/8 * 9 = 13.5cm

    CE = 4/8 * 5 = 2.5 cm
    Ah I knew there must have been something wrong!
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    (Original post by elpaw)
    ah you haven't put down the length bc. that helps.

    DE = (4+8)/8 * 9 = 13.5cm

    CE = 4/8 * 5 = 2.5 cm


    how did u manage that?
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    (Original post by mick665544)
    how did u manage that?
    Its a trapezium ... h(a+b)/2
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    (Original post by mick665544)
    how did u manage that?
    scale factors
 
 
 
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