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assignment - task ii
rectangles in the plane (2)
choose all that define a rectangle in the coordinate plane by the four given points.
a(-4,0), b(3, 2), c(4, -2), d(-2, -3)
a(0,0), b(2, 2), c(7.-3), d(5,-5)
a(-2, 6), b(4,3), c(2, -1), d(-4, 2)
a(-3,-4), b(-1,2), c(2, 1), d(0,-5)
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