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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 fig. Champa and Chameli walk into the class and after observing for a few minutes Champa asks Chameli, “Don’t you think ABCD is a square” ? Chameli disagrees. Using distance formula, find which of them is correct, and why ?
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MBD-COORDINATE GEOMETRY-EXERCISE
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  10. Show that each of the triangles whose vertices are given below is isos...

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  11. Show that each of the triangles whose vertices are given below is isos...

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  15. Show that the following sets of points are the vertices of an equilate...

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  16. Show that the following sets of points are the vertices of an equilate...

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  17. Show that the points :- A (2, 1), B (5, 4), C (4, 7) and D(1, 4)are t...

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  18. Show that the points :- P (3, 2), Q (0, - 1), R (- 3,- 2) and S (0, 1)...

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  19. Show that the points : A (0,- 2), B (3, 1), C (0, 4) and D (- 3, 1) ar...

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  20. Show that the points : P (1, 2), Q (5, 4), R (3, 8) and S (-1, 6) are...

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  21. Show that the points : D (6, 2), E (2, 1), F (1, 5) and G (5, 6) are ...

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