import java.util.ArrayList;

public class InteractiveMath
{


ArrayList<Rectangle>  rectangles;
ArrayList<RightTriangle>  triangles;


public InteractiveMath(){
rectangles = new ArrayList<Rectangle>() ;
triangles = new ArrayList<RightTriangle>();



}


//@ returns the sum of the areas of the rectangles and triangles
public double  computeNetArea(){


}

 

 


}