Question

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Answer 1

Answer:

proof

square has AB=BC=CD=AD and AC=BD

NOW formula is ✓[(x2-x1)^2+(y2-y1)^2]

✓[4-1)^2+ (2-7)^2]=✓[9+25] =✓34

hence we will AB is not equal to BC,CD,AD

hence it is not a square

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