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[" a) "a^(2)],[" The four vertices of a ...

[" a) "a^(2)],[" The four vertices of a quadrilateral are "(1,2),(-5,6),(7,-4)" and "(k,-2)" taken in order.If the ar "],[" quadrilateral is "18" sq.units,then "k" is equal to "],[[" a) "0," b) "2," c) "3," d) "4]]

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