If the point (p,q) (m,n) and (p-m,q-n) are collinear , show that pn=qm

1.	If the point (p,q) (m,n) and (p-m,q-n) are collinear , show that pn=qm
Answer» Use area formula that is:1/2{x1(y2-y3)+(y3-y1)+(y1-y2)}........Then you will get the answer

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