To determine the approximate side length of a square, we need to recall that all sides of a square are of equal length. Thus, if we are given multiple options for the length of the square, we can consider each one as a possible side length.
In this case, we have four options: 30 units, 35 units, 42 units, and 49 units. The side length of the square can be any of these values, but to answer the question, we should focus on understanding that each value represents an individual square with that respective side length.
If we were to calculate the area of a square for each side length, we could do that as follows:
- For 30 units, the area would be 30 * 30 = 900 square units.
- For 35 units, the area would be 35 * 35 = 1225 square units.
- For 42 units, the area would be 42 * 42 = 1764 square units.
- For 49 units, the area would be 49 * 49 = 2401 square units.
So, if the context allows for choosing one of the side lengths provided, the answer would depend on the specific requirements or any additional information about the square we need to consider.
In conclusion, without additional context or parameters for what constitutes the ‘approximate’ side length, any of the provided lengths (30, 35, 42, 49 units) could represent a potential square side length.