Tri-Angle is the debut studio album by South Korean boy group TVXQ, released through SM Entertainment on October 13, 2004.^[1] Several singles were released as part of the album, including "Hug", "The Way U Are", "I Believe" and the title track "Tri-Angle" featuring BoA and The TRAX.

Commercially, the album peaked at number 1 on the monthly MIAK album chart for October 2004, selling over 166,000 copies. It was the 8th best-selling album during 2004 in South Korea, selling over 242,000 copies by the end of the year. In addition, the physical release of the singles "Hug" and "The Way U Are" collectively sold over 380,000 copies.

It sold 242,540 copies and became the eighth most successful album of the year in South Korea.^[2] The first single "Hug" debuted with 169,532 physical copies sold in 2004, peaking at number four on the national monthly chart.^[2][3] As of 2014, it sold 242,890 copies. In November 2004, the Japanese version of "Hug" was released in Japan by Rhythm Zone, ultimately selling 4,710 copies.

The second single, "The Way U Are" debuted at number two on the national chart and sold 214,069 copies with its physical release.^[2][4] By the end of the year, the single sold 300,226 copies. The album's last title single "Tri-Angle" uses a sample from the Symphony No. 40 in G minor by Mozart. The single also features the vocals of BoA and rock band the TRAX, however it was not released as a physical single. The album Tri-Angle sold approximately 309,000 copies as of 2011.^[5][6]