Final answer:
The segment that does not belong with the other three is tangent.
Step-by-step explanation:
The segment that does not belong with the other three is tangent. A chord is a line segment that connects two points on a circle, while a radius is a line segment that connects the center of the circle to a point on the circle. A diameter is a chord that passes through the center of the circle. However, a tangent is a line that touches the circle at exactly one point and does not pass through the center.