## Segment

### In mathematics, a segment refers to a specific portion of a line

In mathematics, a segment refers to a specific portion of a line. It has two endpoints and contains all the points on the line between those endpoints. A segment is denoted by drawing a line segment with a line on top and labeling the two endpoints with capital letters. For example, if we have a line segment with endpoints A and B, we would write it as AB or BA.

Segments have several fundamental properties. One important property is the length of the segment, which can be determined using distance formula or by counting the units. The length of a segment is always a positive real number.

Additionally, segments can be classified based on their lengths. A segment with equal lengths for both endpoints is called a congruent segment. On the other hand, if the lengths of the endpoints are not equal, it is referred to as an incongruent segment.

Segments also have the property of being able to be extended infinitely on either end. This means a segment can be extended to form a line with the same endpoints. The extended portion is sometimes referred to as a ray, which extends infinitely in one direction.

Finally, it’s worth mentioning that segments play a crucial role in many geometric concepts, such as angles, polygons, and circles. They serve as fundamental building blocks for constructing and analyzing various geometric objects.

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