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Coordinates: plotting
Move point A to (-2,3), B to (10,3) and C to (8,-2).

Please enable Java for an interactive construction (with Cinderella).
Where should the point D be to complete the parallelogram?
(-3,-2) (-2,4) (4,2) (-4,-2)

a1 a2 a3 a4
b1 b2 b3 b4
c1 c2 c3 c4
d1 d2 d3 d4
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