InterviewSolution
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A(3x_(1), 3y_(1)), B(3x_(2), 3y_(2)), C(3x_(3), 3y_(3)) are vertices of a triangle with orthocentre H at (x_(1)+ x_(2)+ x_(3), y_(1)+y_(2)+y_(3)), then the angleABC= |
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Answer» `(PI)/(2)` |
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