To determine the radius of the base of a cylinder, we typically need specific information, such as the diameter, circumference, or direct measurements from a diagram. Since we can't see the diagram you are referring to, please provide the relevant data or numbers related to the cylinder, and I will be glad to assist you with the calculation or identification of the radius.
If you have a measurement for the diameter, remember that the radius is half of the diameter. If you have the circumference, you can find the radius using the formula:
\[ R = \frac{C}{2\pi} \]
where \( R \) is the radius and \( C \) is the circumference. Let me know the details, and I can help you further!