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    OABCDE is a regular polygon. Name:  Screenshot_20171023-173953.png
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    I have no idea about OA VECTOR and my exam wednesday
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    (Original post by Deffect)
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    All sides of the polygon have equal length. What is the vector BC in terms of b and c?
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    I solved this part and answer c-b
    I need OA position vector
    Thanks for your help
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    if you know that it is regular, then you can picture the line OB as being upside-down (C to A) and still be exactly the same length (which is b) and then you can simply trace the path from O to C to A. (remember to check the direction of the arrows)
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    (Original post by Deffect)
    I solved this part and answer c-b
    I need OA position vector
    Thanks for your help
    and you can find DC now which is the same as OA because it is parallel and has equal distance.
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    I don't understand .. Can you show a full work to solve this question ?
 
 
 
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