Final answer:
Segment AB in circle Q is a chord.
Step-by-step explanation:
Segment AB in a circle Q is identified as a chord. A chord is a straight line segment whose endpoints lie on the circle. In the context of a circle, the terms "diameter" and "radius" have specific meanings:
The diameter of a circle is a chord that passes through the center of the circle.
It is the longest chord in a circle, and it is precisely twice the length of the radius.
A radius is a line segment that connects the center of the circle to any point on the circle's circumference.
It is half the length of the diameter.
Since segment AB doesn't necessarily pass through the center of the circle Q, it is correctly identified as a chord, making neither diameter nor radius an accurate description for it.