Final answer:
In the given triangle with side ratio 2:3:10, the longest side corresponds to 10 units since it represents the largest proportion in the ratio.
Step-by-step explanation:
When examining the given triangle with a side ratio of 2:3:10, it's important to recognize that the numbers in the ratio represent proportional lengths of the sides, not their actual measurements. However, the question inquires about which side corresponds to the longest side in terms of this ratio. In a direct comparison, 10 units is the largest number compared to 2 units and 3 units. Therefore, the longest side of the triangle would be proportional to 10 units.