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Thread: Parallelogram vectors

  1. September 25th 2010, 08:54 AM #1
    Evaldas
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    Parallelogram vectors

    ABCD - parallelogram:


    vector AB + vector DC = ?
    So I would want to do this:

    And say that vector AB + vector DC = vector AC, but I'm pretty sure that's wrong.

    Could someone please help? We've just started vectors.
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  2. September 25th 2010, 09:51 AM #2
    Plato
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    \overrightarrow {AB} + \overrightarrow {DC} = 2\overrightarrow {AB}
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  3. September 25th 2010, 09:57 AM #3
    Evaldas
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    Thank you! But could it also be \overrightarrow {AB} + \overrightarrow {DC} = 2\overrightarrow {DC}?
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  4. September 25th 2010, 09:59 AM #4
    Plato
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    Yes.
    \overrightarrow {AB} = \overrightarrow {DC}
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