OAB is a triangle. P, Q and R are the midpoints of OA, AB and OB respectively.

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OAB is a triangle. P, Q and R are the midpoints of OA, AB and OB respectively. OP and OR are equal to p and r respectively.


a. Find 


i. OB(vector) 


ii. PQ(vector)


b. Hence prove that triangle PAQ is similar to triangle OAB.


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