Add two vectors to determine a resultant by a graphical method ( A + B = R )

reference:

Summation of vectors

http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=216.msg846#msg846

Add two vectors to determine a resultant by a graphical method

taken from http://www.seab.gov.sg/SEAB/oLevel/syllabus/2009_GCE_O_Level_Syllabuses/5058_2009.pdf

work in progress.....

and then for

add and subtract coplanar vectors.

taken from http://www.seab.gov.sg/SEAB/aLevel/syllabus/2008_GCE_A_Level_Syllabuses/8866_2008.pdf

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