public class Line1 {
    
    int x1, y1, x2, y2;
    
    void printLength ( ) {
        double length;
        length = Math.sqrt ( ____ ) ;
        System.out.println ("Line length is " + length);
    }
    
    void printAngle ( ) {
        double angleInDegrees = Math.atan2 ( ____ , ____ ) * 180.0 / Math.PI;
        System.out.println ("Angle is " + angleInDegrees + " degrees");
    }

    public static void main(String[] args) {
        System.out.println ("testing Line1");
        // Set myLine to contain a reference to a new line object.
        // Initialize myLine's x1 and y1 to the point (5, 10),
        // and initialize myLine's x2 and y2 to the point (45, 40).
        // Print the line's length, which should be 50.
        // Print the line's angle, which should be around 36.87 degrees.
    }
}