1. Match the word with the \"concept\". Write the letter of the conept in the blank beside the word. Words Concepts _ magnitude A - A vector between two points _ standard position B - A vector of magnitude one > > _span{ a , v } C - A number that stretches or shrinks a vector > > _, _scalar D-{w =au+bv, a,be[R} unit vector E - the direction of a vector F - a vector with its tail at the origin (3 - a vector obtained by adding two other vectors together H - the length of a vector