The Iron Triangle (film) The Iron Triangle (film) The Iron Triangle is a 1989 film about the Vietnam War shot in Sri Lanka and directed by Eric Weston. The story is based on the diary of an unknown Viet Cong Soldier. This unique fact gives the movie a different perspective than many of the other movies about the Vietnam war and makes black and white distinctions about who were the "good guys" and "bad guys" a little more complicated. The film stars Beau Bridges, Haing S. Ngor, Liem Whatley, Johnny Hallyday, Jim Ishida, and Ping Wu. Each character helps bring to life the struggle
Integer triangle then all the other points are at ("x, y") where "x" and "y" range over all positive and negative integers. A lattice triangle is any triangle drawn within a 2D lattice such that all vertices lie on lattice points. By Pick's theorem a lattice triangle has a rational area that either is an integer or has a denominator of 2. If the lattice triangle has integer sides then it is Heronian with integer area. Furthermore, it has been proved that all Heronian triangles can be drawn as lattice triangles. Consequently, an integer triangle is Heronian if and only if it