Question: In a circle, if the angle subtended by an arc at the center is 80 degrees, what is the angle subtended by the same arc at any point on the circumference?

Options:

1. 40 degrees
2. 80 degrees
3. 60 degrees
4. 20 degrees

Correct Answer: 40 degrees

Solution:

The angle at the circumference is half of the angle at the center, so it is 80/2 = 40 degrees.