Question

a is the center of the circle, and the length of cd is 15 centimeters.
name a segment that is a radius. segment

Explanation:

Step1: Recall the definition of radius

The radius of a circle is a line segment from the center of the circle to any point on the circle.

Step2: Identify the radius in the given circle

Since \(A\) is the center of the circle, segments \(AE\), \(AG\), \(AB\), \(AD\), \(AC\) are all radii (any one of them can be chosen as per the requirement).

Answer:

segment \(AE\) (or \(AG\) or \(AB\) or \(AD\) or \(AC\))