public TeloA(double a, double b, double c, double d, double h)
 {
     p1 = new Pravougaonik(a, d);
     p2 = new Pravougaonik(p1.GetO(), h);
     p3 = new Pravougaonik(c + b, d);
     t  = new Trougao(a, b, c);
 }
        private Pravougaonik m; // mozemo koristiti iz prethodnog zadatka (reference + using)

        public PP3Prizma(double a, double h)
        {
            this.b = new JSTrougao(a);
            this.m = new Pravougaonik(b.GetO(), h);
        }