Preparation materials: compass and ruler

1, first draw a number axis with a ruler, mark the number and direction.

2. Then write the combination number of root number 13 on the draft paper, preferably a number that can be squared.

3. After determining that it is 2 and 3, plan a vertical line with a circle on the number axis 3.

4. Then measure the distance from 0 to 2.

Mark this distance on the vertical line just drawn, and pay attention to the picture.

6. Then put this point, that is, point B,

7. Connect with the position where 2 is located.

8. Measure the length of this diagonal line with a compass.

9. Then aim the iron tip of the compass at 2 and draw a line on the number axis.

10, don't forget to add a conclusion after painting.