Three corners of a rectangle drawn using the Java coordinate

Three corners of a rectangle drawn using the Java coordinate system have coordinates (3,4) , (3,7) , and (8,7) . What are the coordinates of the fourth corner?

Please explain why, thank you !

Solution

import javax.swing.JApplet;
import java.awt.*;
public class Einstein extends JApplet {
  
public void paint (Graphics page) {
page.drawRect (50, 50, 40, 40);
page.drawRect (60, 80, 225, 30);
page.drawOval (75, 65, 20, 20);   
page.drawLine (35, 60, 100, 120);
page.drawString (\"Out of clutter, find si
mplicity.\", 110, 70);   
page.drawString (\"-- Albert Einstein\", 130, 100);
}
}