Question

Which of the following is an example of an undefined notion?(1 point) Responses A line segment is an example of an undefined notion. A line segment is an example of an undefined notion. A line is an example of an undefined notion. A line is an example of an undefined notion. A circle is an undefined notion. A circle is an undefined notion. An angle is an example of an undefined notion.

Answer 1

In geometry, undefined notions are basic concepts that are not formally defined using other terms. Instead, they are accepted intuitively. Among the options provided, the most common examples of undefined notions are "point," "line," and "plane."

From the options given, "A line is an example of an undefined notion" is correct. Therefore, the answer is:

**A line is an example of an undefined notion.**