public class Triangle extends GeometricObject {
    private double a;
    private double b;
    private double c;

    public Triangle () {

    }

    public Triangle (double a,double b,double c) {
        this.a=a;
        this.b=b;
        this.c=c;


    }

    /**Return side a */
    public double geta() {
    return a ;
    }
    /**Return side b */
    public double getb() {
        return b ;

    }
    /**Return side c */
    public double getc() {
        return c ;

    }

    public void seta(double a) {
        this.a=a;

    }
    public void setb(double b) {
        this.b=b;
    }
    public void setc(double c) {
        this.c=c;

    }

    public double getArea() {
        return (a+b+c)/2;
    }
    public double getPerimeter() {
        return a+b+c;
    }
}