Questions: Find image of O (0,0) after two reflections first across L1 and then across L2 L1x=a L2y=b.
L1, x = a
The point (0,0) will move to the position (2a,0)
L2, y = b
The point (2a,0) will move to the point (2a,2b)
After reflections about L1 and L2, the origin moves to (2a,2b)