Final answer:
Triangle A"B"C" and triangle ABC can be described as a 180-degree rotation.
Step-by-step explanation:
The relationship between triangle A"B"C" and triangle ABC can be described as a 180-degree rotation. When triangle ABC is reflected across the y-axis to form A'B'C', the image is flipped horizontally. Then, when A'B'C' is reflected across the x-axis to form A''B''C'', the image is flipped vertically. Both of these reflections result in a total change in orientation of the original triangle, which can be described as a 180-degree rotation.