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Solve this :

$1.ABCDisaparalle\mathrm{log}ramwithverticesA({x}_{1},{y}_{1}),B({x}_{2},{y}_{2})andC({x}_{3},{y}_{3}),findthecoordinatesofthefourthvertexDintermsof{x}_{1},{x}_{2},{x}_{3},{y}_{1},{y}_{2}and{y}_{3}.$

https://m.meritnation.com/ask-answer/question/1-name-the-type-of-triangle-pqr-formed-by-the-points-p/coordinate-geometry/1679921

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