Final answer:
The ratio of the corresponding sides of the given triangles are 1:4, 1:6, and 1:2.67.
Step-by-step explanation:
To find the ratio of the corresponding sides of two triangles, we can compare the lengths of their corresponding sides. Let's take the first pair of sides, which are 2.5 cm and 10 cm. To simplify the ratio, we can divide both values by their greatest common factor, which is 2.5. This gives us a ratio of 1:4. We can follow the same process for the other corresponding sides, 2 cm and 12 cm, and 3 cm and 8 cm, which gives us ratios of 1:6 and 1:2.67 respectively. So, the ratios of the corresponding sides of the triangles are 1:4, 1:6, and 1:2.67.