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Mathematics 20 Online
OpenStudy (anonymous):

PLEASE HELP ME!!! Pentagon ABCDE has these coordinates: A- (0,0) B- (-1,2) C- (1,4) D- (3,2) E- (2,0). Rotate the figure 90 degrees counterclockwise about the origin, (0,0).

OpenStudy (anonymous):

have you gone to wolframalpha.com

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