Jawabanmu

2014-04-17T10:00:36+07:00
Rumus = A(x,y)----->(O,90°)--->A'(-y,x)

A(-4,1) ----> A'(-1,-4)
B(-1,2) ----> B'(-2,-1)
C(-2,4) ----> C'(-4,-2)

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2014-04-17T10:50:27+07:00