Question

which figure represents an undefined term?

Explanation:

In geometry (a subfield of Mathematics), the undefined terms are point, line, and plane. A line is defined as a straight, one - dimensional figure that extends infinitely in both directions. Let's analyze each option:

• The first figure is a ray (has one endpoint and extends infinitely in one direction), not an undefined term (ray is defined using line and point).
• The second figure is a line segment (has two endpoints), which is defined using points, so not an undefined term.
• The third figure shows two rays from a common point, forming an angle (angle is defined using rays), so not an undefined term.
• The fourth figure is a line as it has arrows on both ends, indicating it extends infinitely in both directions, and line is an undefined term in geometry.

Answer:

The fourth figure (with points X and Y and arrows on both ends)