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If the points A(1,1), B(-1,-1) and `C(-sqrt(3),sqrt(3))` are the vertices of a triangle isA. right-angledB. isoscles but not right angledC. equilateralD. name of these |
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Answer» Correct Answer - D We have, `AB=2sqrt(2),BCsqrt((3-1)^(2)+(sqrt(3)+1)^(2))=2sqrt(2)` `and,AC=sqrt((3-1)^(2)+(sqrt(3)+1)^(2))=2sqrt(2)` `:. AB=BC=CA` So, `DeltaABC` is equilateral. |
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