Question

which is defined using the undefined terms point and line?
angle
circle
parallel lines
ray

Explanation:

An angle is formed by two rays with a common endpoint. A ray is defined as a part of a line that has one endpoint and extends infinitely in one direction. A point is used to define the endpoint of the ray. So an angle is defined using points and lines (through the concept of rays). A circle is defined in terms of a set of points equidistant from a center - point, parallel lines are two lines in a plane that do not intersect, and a ray is directly defined using a point and a line. But the question asks for a concept that is defined using point and line in a more "derived" sense among these options, and that is the angle.

Answer:

angle