public abstract class Inclinable extends Forme {
    private double angle;
    public Inclinable(double cx, double cy, double a) {
        super(cx, cy);
        this.angle = a;
    }

    public void rotation(double a) {
        this.angle += a;
    }

    @Override
    public String toString() {
        return super.toString() + " incliné de " + angle;
    }

}