public Angles findAnglesByAngleAndTwoEdges(double a, double angle, double b){
        double c = findEdgeByAngleAndTwoEdges(a, angle, b);

        double alpha = Math.toDegrees(Math.acos((Math.pow(b, 2) + Math.pow(c, 2) - Math.pow(b, 2)) / (2 * b * c)));
        double gamma = angle;
        double beta = 180 - alpha - gamma;

        System.out.printf("edges: - edge A: %.1f, edge B: %.1f, edge C: %.1f \n", a, b, c);
        System.out.printf("ang:   - alpha: %.2f, beta: %.2f, gamma: %.2f\n\n",  alpha, beta, gamma);

        return new Angles(alpha, beta, gamma);
    }

    public double findEdgeByAngleAndTwoEdges(double a, double angle, double b){
        double c = Math.sqrt(Math.pow(a, 2) + Math.pow(b, 2) - 2 * a * b * Math.cos(angle));
        return c;
    }