title: "Rochthuk"
text: "En Rochthuk as en sjauerhuk m\u00e4 banenwinkler faan 90\u00b0.\n\nEn rochthuk as uk en paraleelogram, nemelk ian m\u00e4 rocht winkler, en \"likwinklag paraleelogram\".\nEn rochthuk as uk en trapeets, nemelk ian m\u00e4 paraleel sidjen.\nEn rochthuk woort tu en kwadroot, wan aal a sidjen likelung san, en \"liksidjag rochthuk\"\n\nEegenskapen \nUun arke rochthuk t\u00e4\u00e4lt:\n A banenwinkler san tuup 360\u00b0.\n Jinauer leien sidjen san likelung an parallel.\n A diagonaalen san likelung an skeer ark\u00f6\u00f6der uun a maden.\n D\u00fc k\u00f6nst en amkreis tiakne m\u00e4 disalew madelponkt \u00fcs a diagonaalen.\n Hat h\u00e4\u00e4 tau speegelaaksen, diar luadrocht \u00fc\u00fcben\u00f6\u00f6der stun.\n Hat h\u00e4\u00e4 en speegelponkt, huar a diagonaalen skeer.\n\nBereegnangen\n\nGulen Rochthuk \n\nBi en Gulen Rochthuk ferhual a sidjen jo tuen\u00f6\u00f6der:\n\nD\u00fc k\u00f6nst \u00fctjreegne, h\u00fcf\u00f6lse linger det linger sidj as:\n \n\n1,618... as det \"Gulen Taal\". Det Gulen Rochthuk st\u00e4\u00e4nt uun a konst f\u00f6r harmonii.\n\nLuke uk diar \n\n Gulen Skeer\n\nGeometrii"