| Triangle Fraternity | |
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| Founded | April 15, 1907; 118 years ago (1907-04-15) University of Illinois at Urbana–Champaign |
| Type | Social |
| Affiliation | NIC |
| Status | Active |
| Emphasis | Engineering,architecture, andscience |
| Scope | National |
| Motto | Veritas Omnia Vincit "Truth Conquers All" |
| Member badge |  |
| Colors | Old Rose and Gray[1] |
| Symbol | Engineers'transit |
| Flag |  |
| Flower | Whitechrysanthemum |
| Publication | Triangle Review |
| Philanthropy | FIRST |
| Chapters | 34 |
| Colonies | 3 |
| Members | 1,200+ active 26,000+[2] lifetime |
| Headquarters | 120 South Center St Plainfield,Indiana 46168 United States |
| Website | www |
Triangle Fraternity () is an American collegiatefraternity for male students majoring in engineering, architecture, and the physical, mathematical, biological, and computer sciences.
Triangle Fraternity organized at theUniversity of Illinois at Urbana–Champaign in the fall of 1906 and was incorporated by the state ofIllinois on 15 April 1907, which is celebrated each year as Founders' Day.
As of 2025 there are 34 chapters and three colonies of Triangle Fraternity active in the U.S.[2] The headquarters is located inPlainfield,Indiana in a historic building erected as aCarnegie library in 1912.[3]
Triangle was formed in the fall of 1906 by sixteencivil engineering juniors at theUniversity of Illinois. It was formally incorporated on 15 April 1907. The date of incorporation has been designated as Founders' Day, and Triangle celebrates it every year at each chapter.
Triangle's mission statement reads, "The purpose of Triangle shall be to maintain a fraternity of engineers, architects and scientists. It shall carry out its purpose by establishing chapters that develop balanced men who cultivate high moral character, foster lifelong friendships, and live their lives with integrity."
Triangle Fraternity was founded on high ethical and moral ideals, and expects the men of the fraternity to follow a set Code of Ethics, which is as follows:
As a member of Triangle, I recognize my obligation to:
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