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सिद्ध कीजिए कि बिन्दु `(-4, -1), (-2,-4), (4, 0)` तथा `(2,3)` एक आयत के शीर्ष है |

Answer» `A = (-4,-1), B = (-2-4), C =(4,0) , D = (2,3)`
`AB = sqrt((-4+2)^(2) + (-1+4)^(2)) = sqrt(13)," "BC = sqrt((-2-4)^(2) + (-4-0)^(2)) = sqrt(52)`
`CD = sqrt((4-2)^(2) + (0-3)^(2)) = sqrt(13), " "DA = sqrt((2+4)^(2) + (3+1)^(2)) = sqrt(52)`
`AC = sqrt((-4-4)^(2) + (-1-0)^(2)) = sqrt(65), " "BD = sqrt((-2-2)^(2) + (-4 -3)^(2)) = sqrt(65)`
`स्पष्टतः AB = CD व BC = DA एवं विकर्ण AC = बढ़


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