Chapter 1 rational number in the first volume of grade seven.
1. 1 positive and negative numbers
1.2 rational number
Addition and subtraction of rational number 1.3
Multiplication and division of rational number 1.4
1.5 power of rational number
Chapter II Addition and subtraction of algebraic expressions
2. 1 algebraic expression
2.2 Addition and subtraction of algebraic expressions
Chapter III One-variable Linear Equation
3. 1 From Formula to Equation
3.2 Solving a linear equation with one variable (1)- merging similar terms and shift terms.
3.3 Solve the linear equation of one variable (2)-Remove brackets and denominator.
3.4 Practical problems and linear equations of one variable
Chapter IV Preliminary Geometry
4. 1 geometry
4.2 Lines, rays and line segments
4.3 jiao
4.4 This topic is to study the design and manufacture of cuboid packaging carton.
Seventh grade, book 2, chapter 5, intersection line and parallel line
5. 1 intersection line
5.2 Parallel lines and their determination
5.3 Properties of parallel lines
5.4 Translation
Chapter VI Real Numbers
6. 1 square root
6.2 cube root
6.3 real numbers
Chapter VII Plane Cartesian Coordinate System
7. 1 plane rectangular coordinate system
7.2 Simple application of coordinate method
Chapter VIII Binary Linear Equations
8. 1 binary linear equations
8.2 Elimination Method-Solving Binary Linear Equation
8.3 Practical Problems and Binary Linear Equations
8.4 Solutions of ternary linear equations
Chapter 9 Inequality and Unequal Groups
9. 1 inequality
9.2 One-dimensional linear inequality
9.3 One-dimensional linear inequality system
Chapter 10 Data Collection, Arrangement and Description
10. 1 statistical survey
10.2 histogram
10.3 project learning talking about water saving from data
Chapter 1 1 triangle in the first volume of Grade 8.
1 1. 1 line segment related to triangle
1 1.2 Angle related to triangle
1 1.3 sum of polygons and their internal angles
Chapter 12 congruent triangles
12. 1 congruent triangles
12.2 Determination of Triangular Congruence
Properties of 12.3 bisector
Chapter 13 Axisymmetric
13. 1 axisymmetric
13.2 draw an axisymmetric figure
13.3 isosceles triangle
13.4 the shortest path problem of project learning
Chapter 14 multiplication and factorization of algebraic expressions
14. 1 multiplication of algebraic expressions
14.2 multiplication formula
14.3 factorization
Chapter 15 Scores
15. 1 score
15.2 decimal operation
15.3 fractional equation
Eighth grade Volume II Chapter 16 Quadratic Radical
16. 1 quadratic radical
16.2 multiplication and division method of quadratic radical
Addition and subtraction of 16.3 quadratic radical
Chapter 17 Pythagorean Theorem
17. 1 Pythagorean theorem
Inverse Theorem of Pythagorean Theorem 17.2
Chapter 18 Parallelogram
18. 1 parallelogram
18.2 Special parallelogram
Chapter 19 Linear Functions
19. 1 function
19.2 linear function
19.3 project learning options
Chapter 20 Data Analysis
20. 1 data concentration trend
20.2 degree data fluctuation
20.3 Data in the study of physical health test subjects
Ninth grade, volume 1, chapter 21, quadratic equation in one variable
2 1. 1 a quadratic equation
2 1.2 Solving quadratic equation with one variable
2 1.3 Practical Problems and Quadratic Equation of One Variable
Chapter 22 Quadratic Function
22. Images and properties of1quadratic function
22.2 Quadratic function and quadratic equation of one variable
22.3 Practical Problems and Quadratic Functions
Chapter 23 Rotation
23. 1 graphic rotation
23.2 Center symmetry
23.3 Theme research mode design
Chapter 24 Circle
Some properties of1circle
24.2 Position relationship between point and circle, straight line and circle
24.3 Regular polygons and circles
24.4 Arc length and sector area
Chapter 25 Preliminary Probability
25. 1 random events and probability
25.2 Using enumeration method to find probability
25.3 Use frequency to estimate probability
Ninth grade, Volume II, Chapter 26 Quadratic function
26. 1 quadratic function and its image
26.2 From the perspective of function, the quadratic equation of one variable is viewed.
26.3 Practical Problems and Quadratic Functions
Chapter 27 Similarity
27. 1 graphic similarity
27.2 similar triangles
27.3 Similarity
Chapter 28 Acute Angle Trigonometric Function
28. 1 acute trigonometric function
28.2 Solving Right Triangle
Chapter 29 Forecasts and Views
29. 1 projection
29.2 Three Views
29.3 theme learning to make three-dimensional models
The above is the complete version of the junior high school mathematics catalogue I compiled, hoping to help you.
With point d as DE¡ÍAB in e,
And DC¡ÍCB, AB¡ÍCB,
¡à¡ÏDEB=¡ÏABC=¡ÏDCB=90£¬
¡à Quadrilateral DEBC is a rectangle,
In Rt¡÷ADE, ¡Ï ¦Á = 43, DE = CB =139m.
A