You should start from the basics, find things in grades five and six, be particularly familiar with those basic figures, think about the formulas of area and volume, memorize them first, and then do about five exercises for each knowledge point. If you have mastered it completely, start the next knowledge point. 1 There are not many things in the grade, and the main triangle is congruent. You should be particularly familiar with the corners and sides inside and the middle and high corners of special lines. In the second grade, you should first divide three lines and eight corners into parallel lines and find them very skillfully. Go to the second day first! The third grade is another story! O