1. **Problem Statement:** We have a circle with center at Point A and a point B on the perimeter. We need to determine if Line AB is a radius of the circle. 2. **Definition of Radius:** A radius of a circle is a straight line segment from the center of the circle to any point on the circle's perimeter. 3. **Observation:** The line segment from A to B is curved, not straight. Since a radius must be a straight line, Line AB as shown is not a radius. 4. **Conclusion:** Line AB is not a radius because it is curved. 5. **Drawing a Radius:** To draw a radius, we draw a straight line segment from Point A (center) directly to Point B (on the perimeter). 6. **Summary:** A radius must be straight. The curved line AB is not a radius, but the straight line segment from A to B is the radius. Final answer: No, Line AB is not a radius because it is curved. A radius must be a straight line from the center to the perimeter.