1, first put a ruler on the paper that needs to draw a line segment, hold it down with your left hand, and draw an endpoint on the 0 scale with a pencil;
2, and then draw another endpoint on the corresponding scale;
3. Finally, connect the two endpoints with a straight line.
Knowledge expansion:
Line drawing is a method of describing data or concepts with lines, which makes complex data or information easy to understand by presenting information graphically. Line charts are mainly used to show the relationship between two variables, and are usually used in mathematics, statistics and economics.
The production steps of the line graph are as follows:
1, determine the range of data or information. Make clear the range and type of data or information to be presented, so as to select the appropriate chart type.
2. Prepare data. Organize the data into tables, which should contain the required data information, such as variable values and corresponding line segment lengths.
3. Draw a vertical line. Draw a vertical line on the left side of the chart so that it is perpendicular to the X axis. This line will be used to represent variables on the x axis.
Draw a horizontal line. Draw a horizontal line at the bottom of the chart so that it is parallel to the Y axis. This line will be used to represent variables on the y axis.
5. Draw a line segment. According to the data in the table, the starting point and ending point of the line segment are connected to the vertical line and the horizontal line respectively, thus forming a line segment.
6. Mark variables and data points. Mark the variable names on the X axis and Y axis, and the data points represented by each line segment on the chart.
7. Mark the legend. If there are multiple line segments in the chart, you need to mark a legend on the right side of the chart to explain the meaning of each line segment.
A line segment means that both ends have endpoints and cannot be extended, which is different from straight lines and rays; The length of the line segment is limited and can be measured; There are two endpoints; There is symmetry; The straight line between two points is the shortest distance between them.
The line segment is an axisymmetric figure, because the line segment is folded along the midline, and the parts on both sides of the midline can completely overlap after folding; Or: the line segment is folded along its straight line, and the parts on both sides can completely overlap after folding.
So the line segment is an axisymmetric figure, which has two symmetrical axes, one is the straight line where the line segment is located, and the other is the middle vertical line of the line segment. The line segment is a centrally symmetric figure, because the line segment rotates 180 around its midpoint, and then it can coincide with the original figure.