The computation of circumcircles of three circles

Deok-Soo Kirn Department of Industrial Engineering Hanyang University 17 Haengdang-Dong, Sungdong-Ku Seoul, 133-791 Korea +82-2-2290-0472 dskim@email.hanyang.ac.kr Donguk Kim Department of Industrial Engineering Hanyang University 17 Haengdang-Dong, Sungdong-Ku Seoul, 133-791 Korea +82-2-2290-0564 donguk@cadcam.hanyang.ac.kr Kokichi Sugihara Department of Mathematical Engineering and Information Physics University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan sugihara@simplex.t.u-tokyo.ac.jp