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
Tangential triangle A reference triangle and its tangential triangle are in perspective, and the axis of perspectivity is the Lemoine axis of the reference triangle. That is, the lines connecting the vertices of the tangential triangle and the corresponding vertices of the reference triangle are concurrent. The center of perspectivity, where these three lines meet, is the symmedian point of the triangle. The tangent lines containing the sides of the tangential triangle are called the exsymmedians of the reference triangle. Any two of these are concurrent with the third symmedian of the reference triangle. The reference triangle's circumcircle, its nine-point circle, its