Urawa Red Diamonds Urawa Reds uses Ohara City Field for training. In addition to this facility, the club opened Redsland in 2005, which has three grass fields, one artificial turf field, one baseball field, futsal courts and tennis courts. Redsland is opened to the public and club members can use the facilities at relatively cheap fees. Urawa Red Diamonds has a local derby with Omiya Ardija, from Omiya-ku, Saitama city. They first met in the 1987 Emperor's Cup, with Mitsubishi defeating NTT Kanto by 5 to 0 at Nishigaoka National Stadium. The derby first took place in the JSL Second Division in the
Incircle and excircles of a triangle circle is formula_100 where "r" is the incircle radius and "s" is the semiperimeter of the triangle. The following relations hold among the inradius "r", the circumradius "R", the semiperimeter "s", and the excircle radii "r", "r", "r": The circle through the centers of the three excircles has radius 2"R". If "H" is the orthocenter of triangle "ABC", then The Nagel triangle or extouch triangle of "ABC" is denoted by the vertices "T", "T" and "T" that are the three points where the excircles touch the reference triangle "ABC" and where "T" is opposite of "A", etc. This triangle "TTT"