Задача на Java

 package geom;



import java.lang.Math;



public class Square {

    protected final float a;



    public Square(float a) {

        this.a = a;

    }



    public float getDiag() {

        return a * Math.sqrt(2);

    }



    public float getPerim() {

        return 4 * a;

    }



    public float getArea() {

        return a * a;

    }



    public String getInfo() {

        return "Сделай сам";

    }

} 

 package geom;



public class RightPyramid extends Square {

    private float h;



    public RightPyramid(float a, float h) {

        super(a);

        this.h = h;

    }



    @Override

    public float getArea() {

        return super.getArea() + super.getPerim() * h / 2.;

    }



    public float getVolume() {

        final float area = super.getArea();

        return area * Math.sqrt(h * h - area / 4.) / 3.;

    }



    @Override

    public String getInfo() {

        return "Тут тоже сделай сам";

    }

}