It seems like you're looking for information about a specific triangle that includes an unknown side length measuring \( 7 - \sqrt{7} \) units. However, the question lacks context about what other sides or angles are involved in the triangle.
To provide a meaningful response, could you clarify what kind of triangle you're referring to? Are you looking for information on properties, relationships between sides (like using the Pythagorean theorem), or are you trying to categorize the triangle based on its side lengths (e.g., scalene, isosceles, equilateral)? Please provide additional details, and I'll be happy to help!