\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
In space, consider the points \(A(1, 1, 0)\), \(B(2, 1, 1)\), \(C(1, 2, 1)\), and \(D(2, 2, 2)\). Show that these four points are coplanar.
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