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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$\displaystyle \overrightarrow {AB} + \overrightarrow {DC} = 2\overrightarrow {AB} $
Thank you! But could it also be $\displaystyle \overrightarrow {AB} + \overrightarrow {DC} = 2\overrightarrow {DC}$?
Yes. $\displaystyle \overrightarrow {AB} = \overrightarrow {DC} $
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