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I need help understanding this block of text

AteAJellyfish (5)
Write your question here.
I don't understand what the extra uses of point are in the rectangle class, I need some insight :Y
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#include <iostream>

class Point
{
    // no constructor, use default
public:
    void setX(int newX) { x = newX; }
    void setY(int newY) { y = newY; }
    int getX() const { return x;}
    int getY() const { return y;}
private:
    int x;
    int y;
};

class  Rectangle
{
public:
    Rectangle(int newTop, int newLeft, int newBottom, int newRight);
    ~Rectangle() {}
    
    int getTop() const { return top; }
    int getLeft() const { return left; }
    int getBottom() const { return bottom; }
    int getRight() const { return right; }
    
    Point getUpperLeft() const { return upperLeft; }
    Point getLowerLeft() const { return lowerLeft; }
    Point getUpperRight() const { return upperRight; }
    Point getLowerRight() const { return lowerRight; }
    
    void setUpperLeft(Point location);
    void setLowerLeft(Point location);
    void setUpperRight(Point location);
    void setLowerRight(Point location);
    
    void setTop(int newTop);
    void setLeft (int newLeft);
    void setBottom (int newBottom);
    void setRight (int newRight);
    
    int getArea() const;
    
private:
    Point upperLeft;
    Point upperRight;
    Point lowerLeft;
    Point lowerRight;
    int top;
    int left;
    int bottom;
    int right;
};
tristan1333 (49)
The Point at the bottom is the actual values of the points, the upper points are the functions that return a Point.
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