Auxiliary line

It is to help solve the problem, and the new points on the auxiliary line are sometimes needed to do the problem. If it is a formal exam, especially the college entrance examination, when drawing auxiliary lines to solve problems, if it is later found useless or not done correctly, it is necessary to draw auxiliary lines again, so it is best to use them.

pencil

exist

Title paper

Draw auxiliary lines, and finally draw the correct auxiliary lines (thinner, smaller or better) on the answer sheet with a black 0.5 mm signature pen, and then make a simple explanation in the answer part, so that,

Batch inspection

The teacher understands your intention. Of course, the base paper had better be neat and clean.

calligraphy

, use

pencil drawing

Finally, it is best to use.

eraser

Put it down.