Iron Triangle (Vietnam) bureau members Phạm Hùng and Lê Đức Thọ, and southern military commander Trần Văn Trà all joined together in the Iron Triangle region to orchestrate the final, decisive attack on Saigon. The area had remained allied with the nationalist communist forces from the beginning of the French war in 1946 to the fall of Saigon in 1975: an exception in a country often torn region by region between control by American forces and control by the Viet Cong. Iron Triangle (Vietnam) The Iron Triangle (Vietnamese:"Tam Giác Sắt") was a area in the Bình Dương Province of Vietnam, so named due
Reuleaux triangle any curve of given constant width. This area is where "s" is the constant width. One method for deriving this area formula is to partition the Reuleaux triangle into an inner equilateral triangle and three curvilinear regions between this inner triangle and the arcs forming the Reuleaux triangle, and then add the areas of these four sets. At the other extreme, the curve of constant width that has the maximum possible area is a circular disk, which has area formula_2. The angles made by each pair of arcs at the corners of a Reuleaux triangle are all equal to 120°.