If polygon ABCD rotates 90° counterclockwise about the origin to create polygon A′B′C′D′, what are the coordinates of point B′ ? (-3,1) (-1,-3) (-1,3) (3,-1)
ayushmanjaiswal:
what is this "(-3,1) (-1,-3) (-1,3) (3,-1)"?
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(-1,3) is the answer
how?
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