I. Definitions and attributes

1. Definition: A line segment can be defined as a finite part between two points on a straight line. It can be defined by two endpoints, namely, the starting point and the ending point of the line segment.

2. Attribute: The line segment is straight, has a length and can be measured. Its length is equal to the distance between the starting point and the ending point.

Second, the elements of the line segment

1, endpoint: both ends of a line segment are called endpoints. Endpoints determine the starting and ending points of line segments.

2. Direction: The direction of the line segment is related to the positions of the starting point and the ending point. The direction from the starting point to the end point is positive, and the opposite direction is negative.

3. Length: The length of a line segment can be obtained by measuring the distance between two endpoints. Length is a non-negative real number.

Third, the basic attributes of line segments

1, finiteness: A line segment has only two endpoints, a starting point and an ending point, so it is a finite line segment.

2. Straight line property: The line segment is straight and its length can be measured.

3. Directionality: The direction of a line segment is determined by the direction from the starting point to the end point, which can be divided into positive direction and negative direction.

4. Endpoint property: The length of the line segment is equal to the distance between the starting point and the ending point, which can be obtained by measurement.

Fourthly, the representation of line segments.

1, symbolic representation: usually two capital letters are used to represent line segments, such as AB and CD. Where a and b are the starting and ending points of the line segment.

2. Graphical representation: In geometry, a line segment is usually represented by a connecting line between two points on a straight line.

3. Text description: In the text description, "line segment AB" can be used to represent the line segment from point A to point B. ..

The application of verb (verb's abbreviation) line segment

1, measurement: The length of a line segment can be used to measure the size or distance of an object. For example, the distance between cities can be represented by line segments on the map.

2. Geometric drawing: In geometry, line segments are one of the basic elements of various shapes and figures. By using line segments, you can draw all kinds of complex geometric figures.

3. Distance between two points: By measuring the length of the line segment between two points, the distance between two points can be obtained. This is widely used in physics, engineering and other fields.

4. Orientation and direction: In geography, line segments can be used to indicate the relative position and direction between geographical locations. For example, on a map, line segments can be used to represent the positions and relative directions of mountains, rivers, cities, etc.

5. Computer graphics: In computer graphics, line segments are one of the basic elements for drawing various shapes and graphs. By using line segments, you can draw various complex shapes and graphs, such as lines, curves and polygons.

6. Engineering drawing: In the field of engineering drawing, line segments are often used to represent important information such as the outline, size and connection points of objects. This information is very important for design and manufacturing.

7. Mathematical analysis: In mathematical analysis, line segment is one of the key elements to study functions, curves and derivatives. Through calculus and line segment analysis, we can study the properties and changing trends of functions and other important issues.