1. The problem is to find the radius of a circle or sphere, but no specific details are given. 2. The radius $r$ is the distance from the center to any point on the circle or sphere. 3. Common formulas involving radius include: - Circumference of a circle: $$C = 2\pi r$$ - Area of a circle: $$A = \pi r^2$$ - Volume of a sphere: $$V = \frac{4}{3} \pi r^3$$ 4. To find the radius, you need one of these values (circumference, area, or volume) or other information. 5. Since no values are provided, the radius cannot be calculated without additional data. 6. Please provide more information such as circumference, area, or volume to find the radius.