Which of the following is an example of an undefined notion? (1 point)

A line is an example of an undefined notion.

A circle is an undefined notion.

An angle is an example of an undefined notion.

A line segment is an example of an undefined notion.

1 answer

The correct answer is:

A line is an example of an undefined notion.

In geometry, undefined notions are basic concepts that are not formally defined but are understood intuitively. A line is one of these fundamental concepts, along with points and planes.