In a classroom, 4 friends are seated at ...

In a classroom, 4 friends are seated at the points A,B,C and D as shown in figure. Jarina and Phani walk into the class and after observing for a few minutes Jarina asks Phani "Don't you think ABCD is a square?" Phani disagrees. Using distance formula. Find which of them is correct. Why?

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The correct Answer is:

`:.square` ABCD forms a square. i.e., Jarina is correct .

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VGS PUBLICATION-BRILLIANT-COORDINATE GEOMETRY -Exercise 7 . 1

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