12. The vertices of a quadrilateral ABCD are A [0,3,5], B [-3,-1,17], C[4,-3,15] and D [7,1,3] Prove that ABCD is a parallelogram.

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A: Thanks for your patience!Kindly comment if you need any further clarifications.

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A: Steps and explanations are as follows:In case of any doubt, please let me know. Thank you.

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A: Solution a. Step 1: Step 2: Step 3: Step 4: Step 5: Step 6: Solution b.  Step 1: Step 2: Step 3:…

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A: Solution:I hope this solution helps you, thanks!

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A: Hope you got your answer, if any query then raise it.Kindly do rate this helpful.....Thank You

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A: Step 1: Step 2: Step 3: Step 4: Step 5: step 6

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A: Referenceshttps://en.wikipedia.org/wiki/Linear_regression

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A: Alternative process