Alk,2K) VgG Fig. 1.29 The diagram shows quadrilateral OABC. The coordinates of A are (k, 2k) where k>0, and OA = V80 units. %3D a. Calculate the value of k Given AB is perpendicular to OA and B lies on the y-axis b. Find the equation of AB and the coordinates of B B.

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Magnitude

A vector is an element with both direction and magnitude. A vector is represented using an arrow, where the arrow represents the direction of the vector and its length is represented using the magnitude. The set of vectors in space is known as vector space. The vectors can be added, subtracted, multiplied, and divided in a vector space. The image below shows a vector AB.