2. Drawing methods of five basic rulers in junior high school mathematics.

3. Draw five basic rulers of junior high school mathematics.

4. Draw five basic math rulers.

1. Drawing method of five basic rulers in junior high school mathematics: make an angle equal to a known angle.

2. Make a bisector with a known angle.

3. Make the middle vertical line of the known line segment.

4. Make a point perpendicular to the known straight line.

5. Draw a parallel line of a known straight line through a point outside it.

6. Ruler drawing is to draw a picture with a ruler and compasses without scale in geometry, which is called ruler drawing.

7. Steps of geometric drawing: known.

8. Describe the given drawing conditions.

9. Seek a job.

10. Describe the drawings that need to meet the requirements of the topic.

1 1. Analysis.

12. Draw a sketch, analyze the known conditions, find out the drawing method and determine the qualified figure.

13. Practice.

14. Describe the drawing process and method, and draw the required graphics.

15. Proof.

16. Verify the correctness of the drawings.

17.

18. According to the conditions of the topic, discuss when the graph is a unique solution, multiple solutions, no solutions and indefinite solutions.