Lines, Line Segments, and Rays

A line goes endlessly in both the directions.
 

1 rem1

A line segment is a part of a line that has 2 endpoints.

1 rem2

A ray is a part of a line that begins at a particular point and extends endlessly in one direction.
 

1 rem3





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Help

The correct answer is

Remember :

The smallest number is the one that comes first while counting.

Solution :

To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.

21,27,23

21 is the smallest number.