A social fraternity
with a technical core

Triangle started in the fall of 1906 with a simple idea: sixteen civil engineering juniors at the University of Illinois wanted to extend their friendship beyond college — and keep it for life. They incorporated the fraternity on April 15, 1907. More than a century later, that's still the whole point.

We're the only national social fraternity built exclusively for students in engineering, science, and architecture. Your brothers are in your classes, chasing the same internships, surviving the same problem sets — so when the weekend comes, the people you study with are the people you actually want to hang out with.

That mix is what makes it work: Grand Prix builds, tailgates, formals, intramurals, and late nights in the lounge, backed by a brotherhood that has your back academically and shows up for the forty years of career that follow.