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[" Q.11If the coordinates of the vertice...

[" Q.11If the coordinates of the vertices of an equilateral triangle with sides of "],[" length 'a' are "(x_(1),y_(1)),(x_(2),y_(2))" and "(x_(3),y_(3))" ,then "],[|[x_(1),y_(1),1],[x_(2),y_(2),1],[x_(3),y_(3),1]|^(2)=(3a^(4))/(4)]

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