1. **Problem Statement:** We are given a circle centered at point O with several radius lines and a diameter line labeled with lengths. 2. **Definitions:** - The **radius** of a circle is the distance from the center to any point on the circle. - The **diameter** of a circle is twice the radius, or the distance across the circle passing through the center. 3. **Given Information:** - Radius lines labeled 4 m, 3 m, and 6 m. - Diameter line labeled 8 m. 4. **Step a) Write down the radius of the circle:** - The radius is the length from the center O to the circle edge. - The radius lines have different lengths (3 m, 4 m, 6 m), but in a circle, all radii must be equal. - Since the diameter is given as 8 m, the radius is half of that. 5. **Calculate the radius:** $$\text{radius} = \frac{\text{diameter}}{2} = \frac{8}{2} = 4$$ 6. **Step b) Write down the diameter of the circle:** - The diameter is given as 8 m. **Final answers:** - Radius = 4 m - Diameter = 8 m