20. 1 translation

20.2 rotation

20.3 Center Symmetry and Center Symmetry Graphics

20.4 Design and Appreciation of Patterns

Chapter 2 1: Functions

2 1. 1 variables and functions

Representation of 2 1.2 function relation

Application of 2 1.3 function

Chapter 22: Quadrilateral

22. Properties of1parallelogram

22.2 Identification of Parallelogram

22.3 triangle midline

22.4 rectangle

22.5 Diamonds

22.6 square meters

22.7 trapezoid

22.8 sum of inner and outer angles of polygon

22.9 Splicing of Plane Graphics

Chapter 23: Fractional Equation

23. 1 fractional equation

23.2 Application of Fractional Equation

Chapter 24: Proposition and Proof (1)

24. 1 proposition

24.2 Proposition proof

24.3 Judgment Theorem of Parallel Lines

24.4 Property Theorem of Parallel Lines

24.5 Triangle Interior Angle Sum Theorem

24.6 Judgment Theorem of Right Triangle Congruence

24.7 the property theorem of the median vertical line and its inverse theorem.

24.8 the property theorem of angle bisector and its inverse theorem

Chapter 25: Linear Functions

25. 1 linear function

25.2 Images and attributes of linear functions

25.3 Method of determining linear function expression

25.4 Relationship between Linear Functions and Equations and Inequalities

25.5 the application of linear function

Chapter 26: Representative Value and Dispersion of Data

26. 1 average and weighted average

26.2 Median and mode

26.3 Variance and standard deviation

Congruent triangles may be the content of the second volume of grade seven.

The next volume of mathematics in the eighth grade should focus on learning functions once! I want you to walk up a flight of stairs