Which figures can be precisely defined by using only undefined terms

The correct answers are circle, line segment, and parallel lines.

Explanation:
The undefined terms of geometry are point, line, and plane.

A circle is a set of points equidistant from a fixed point called the center; this uses no terms except the undefined terms.

A line segment is a part of a line with two distinct endpoints. Again, no terms used other than undefined terms.

Parallel lines are lines that never intersect; again, again no terms other than undefined terms.

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