Final answer:
Undefined terms in Euclidean Geometry include point, line, and plane, whereas a segment and an angle are defined using these concepts. Therefore, segment and angle are NOT undefined terms.
Step-by-step explanation:
The question asks which of the following are NOT undefined terms in Euclidean Geometry: point, segment, line, and angle. In the context of Euclidean geometry, undefined terms are basic concepts that are not defined using other terms. These are assumed concepts that serve as the starting point or foundation of geometric principles. The undefined terms in Euclidean geometry are typically a point, a line, and a plane. A segment and an angle are not undefined terms; they are defined using points and lines. A segment is part of a line bounded by two distinct end points, and an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint called the vertex.