One pointon the originalstar, , is trackedas it is movedby the two reflections.
Notethat:
Star is right side up,Staris upsidedown,”andStaris right side up.is unitsabovethe -axis. is unitsbelowthe -axis.is unitsbelowthe line. is unitsabovethe line.Example 4
The trapezoidis reflectedin the line. The imageof the reflectionof Trapezoidin isTrapezoid'.
Thenthe imageis reflectedin the -axis.The imageof the reflectionofTrapezoid' in the -axisis
Trapezoid".