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Mathematics 7 Online
OpenStudy (ben420):

Polygon ABCD is rotated 90º counterclockwise about the origin to create polygon A′B′C′D′. Match each set of coordinates to the vertices of polygon A′B′C′D′.

OpenStudy (wanell):

Each set of coordinates vertices of polygon A′B′C′D′ rotated 90º about the origin counterclockwise.

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