To determine the correct sequence of the transformations used to map Triangle ABC onto Triangle A"B"C", let's summarize the transformations involved:
- Rotation: Triangle ABC is first rotated around point C to form Triangle A'B'C.
- Translation: Triangle A'B'C is then translated downward to form Triangle A''B''C'.
- Reflection: Finally, Triangle A''B''C' is reflected across line A''B'' to form Triangle A''B''C''.
The correct sequence of transformations is:
Rotation, then translation, then reflection.
So the answer is:
rotation, then translation, then reflection.