Iron Triangle, Richmond, California Iron Triangle of the Vietnam war era.) Residents are attempting to reverse this image in a number of ways. One of these is the new East Bay Center for the Performing Arts (completed in 2011) at MacDonald and 11th St, which contains the aptly-named Iron Triangle Theater. Iron Triangle, Richmond, California The Iron Triangle, sometimes known as Central Richmond, is a neighborhood in Richmond, California. It is a largely residential area but includes the downtown Richmond business district along Macdonald Avenue. Commercial areas on Cutting Boulevard and near Interstate 580 are also in the neighborhood if the more extensive of
Extouch triangle the sides of the reference triangle at the three vertices of the extouch triangle. The area of the extouch triangle, formula_7, is given by: where formula_9, formula_10, formula_11 are the area, radius of the incircle and semiperimeter of the original triangle, and formula_12, formula_13, formula_14 are the side lengths of the original triangle. This is the same area as that of the intouch triangle. Extouch triangle In geometry, the extouch triangle of a triangle is formed by joining the points at which the three excircles touch the triangle. The vertices of the extouch triangle are given in trilinear coordinates by: