å æè¡ã«ããããã£ãŒããã¿ãŒã³ãšã¯äœã§ããïŒ
ãã£ãŒããã¿ãŒã³ã¯ãåºçå³å ã§ææãã©ã®ããã«ååžããŠãããã説æããŸããäžè¬çãªãã¿ãŒã³ã«ã¯ä»¥äžãå«ãŸããŸãïŒãã³ãã«ïŒãã¹ãŠã®ææã120°以å ã匷çãªçŠç¹ïŒãããŠã«ïŒ180°ãèªå·±å®çµïŒããã±ããïŒ1ã€ã®ææãæ®ãã«å¯Ÿå³ã䜿åœççŠç¹ïŒãã¹ãã©ãã·ã¥ïŒåçã«ååžã倿æ§ïŒãã¹ãã¬ã€ïŒç°ãªãã°ã«ãŒãåãå人䞻矩ïŒããã³ã¢ãã£ãïŒ240°ãé§åãããæåïŒããããã®ãã¿ãŒã³ã¯ããšãã«ã®ãŒãã©ã®ããã«æµãã人çã®æ¹åæ§ãã©ãã«ããããçè§£ããããã®ããåºãæèãæäŸããŸãã