A plane is an undefined term because:
Let us consider the options.
Option 1: can be named using three non collinear point.
This is not the correct answer because a plane is a flat, two-dimensional surface that extends infinitely far. Therefore, it is undefined because it is a flat surface that extends indefinitely in all directions.
Option 2: is described generally, not using a formal definition.
This is not the correct answer because a plane is a flat, two-dimensional surface that extends infinitely far. Therefore, it is undefined because it is a flat surface that extends indefinitely in all directions.
Option 3: is where other geometric shapes can be constructed.
This is not the correct answer because a plane is a flat, two-dimensional surface that extends infinitely far. Therefore, it is undefined because it is a flat surface that extends indefinitely in all directions.
Option 4: is a flat surface that extends indefinitely in all directions.
This is the correct answer as plane is a flat surface that extends indefinitely in all directions.
Therefore, option 4 is the correct answer.
