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Mathematics 11 Online
jagr2713 (jagr2713):

What rotation was applied to triangle DEF to create triangle D'E'F'? None of the above 90° counterclockwise 180° 90° clockwise

jagr2713 (jagr2713):

ty

OpenStudy (anonymous):

because D'E'F is the symmetry of DEF with respect to the origin so it would be 180%

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