1.

Four points A(+1, -1, 1) , B(1, 3, 1), C(4, 3, 1), and D(4, -1, 1), taken in order are the vertices of

Answer»

a parallelogram which is NEITHER a RECTANGLE nor a rhombus
rhombus
an isosceles TRAPEZIUM
a cyclic quadrilateral

Answer :d


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