Posted by Maranda on Thursday, September 27, 2012 at 11:51am.
reflect over y=0: (x,y) -> (x,-y)
A(1,2) -> A'(1,-2)
B(1,6) -> B'(1,-6)
C(3,6) -> C'(3,-6)
reflect in y=x: (x,y) -> (y,x)
A'(1,-2) -> A*(-2,1)
B'(1,-6) -> B*(-6,1)
C'(3,-6) -> C*(-6,3)
combined image: (x,y) -> (-y,x)
i don't know
(-6,3)