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Mathematics 13 Online
OpenStudy (anonymous):

An image point after a 180° rotation is Z'(5, 9). What were the coordinates of the pre-image point? Z(-9, -5) Z(-9, 5) Z(-5, -9) Z(9, -5)

OpenStudy (anonymous):

@kc_kennylau

OpenStudy (kc_kennylau):

Again, 180° rotation is (x,y) -> (-x,-y)

OpenStudy (kc_kennylau):

Take out a piece of paper and draw it

OpenStudy (anonymous):

its C

OpenStudy (kc_kennylau):

Yes

OpenStudy (anonymous):

good job

OpenStudy (anonymous):

thx :)

OpenStudy (kc_kennylau):

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