JavaScript Unit 4 EXAMS WITH 100%
VERIFIED SOLUTIONS 2025/2026 STUDY
GUIDE
The following program should draw a circle on the screen:
1 function main(){
2 let circle = new Circle(40);
3 circle.setPosition(getWidth() / 2, getHeight() / 2);
4 circle.setColor("blue");
5 } main();
But when we run this code, we don't see the circle. What is missing from our main function?
We never set the circle's radius.
We need to add the line
circle.setRadius(40);
After line 4
We are setting the position of the ball to be off the canvas.We need to change line 3 to be
circle.setPosition(0, 0);
We are creating the circle incorrectly. We need to specify the width and height.We need to change
line 2 to be
let circle = new Circle(40, 40);
We create the circle and position it correctly on the screen, but we never add it to the screen.We
need to add the line
add(circle);
JavaScript
after line 4
