Answer:
The undefined term "point" is used in the mathematical term "parallel lines."
The undefined terms "line" and "point" are used in the mathematical term "perpendicular lines."
The undefined terms "line" and "point" are used in the mathematical term "line segment."
In mathematics, undefined terms are basic concepts that are not defined in terms of other concepts. They are the building blocks of geometry and are used to define other terms. The three undefined terms in geometry are point, line, and plane. These undefined terms are used to define other terms, such as parallel lines, perpendicular lines, and line segments.
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