public Krug(Tacka A1, Tacka A2, Tacka A3, string ime) { Duz a = new Duz(A1, A2); Duz b = new Duz(A2, A3); if ((Math.Abs(b.K - a.K) < GeoGebra.eps) || (a.Ime == "-1") || (b.Ime == "-1")) { this.C = null; this.r = 0; this.ime = "-1"; } else { this.C = b.Simetrala().Presek(a.Simetrala()); this.r = C.Rastojanje(A1); this.ime = ime; } }