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    a) I don't get how \vec{OP} = \vec{OT} + \vec{TP}

    b) For b) why does it have to be \vec{TM} = \vec{TO} + \vec{OM}

    Why not ? \vec{TM} = \vec{OT} + \vec{OM}
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    (Original post by uer23)
    ...
    Vectors have direction.

    \vec{AB} = -\vec{BA}
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    (Original post by Mr M)
    Vectors have direction.

    \vec{AB} = -\vec{BA}
    How can we say \vec{OP} = \vec{OT} + \vec{TP}

    I still don't get it, how can adding the two side of the triangle give us the length of \vec{OP}
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    (Original post by uer23)
    How can we say \vec{OP} = \vec{OT} + \vec{TP}

    I still don't get it, how can adding the two side of the triangle give us the length of \vec{OP}
    It doesn't give the length. There's your problem.
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    (Original post by uer23)
    How can we say \vec{OP} = \vec{OT} + \vec{TP}

    I still don't get it, how can adding the two side of the triangle give us the length of \vec{OP}
    Vectors take you from one place to another (at GCSE)

    So, to get from O to P you can either go direct OP

    Or you can go via T ... OT + TP

    Since these both take you from O to P they are the same in terms of vectors
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    Think of vectors as a 'road system'.

    To get to P from O we can go directly OP or we can go OT then TP; does that help?
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    Ha, ha - great minds think alike TenOfThem
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    In General if you want XY you can write XM + MY... as long as the two middle letters are the same it will work .
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    (Original post by Muttley79)
    Ha, ha - great minds think alike TenOfThem
    I actually take toy cars in when we are doing vectors
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    So do I! With my weaker students it really helps with understanding vectors have direction too.
 
 
 
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