The eighth grade mathematics textbook catalogue People's Education Edition Volume 1 Chapter 11 Triangle
1 1. 1 line segment related to triangle
Information technology uses drawing to find rules
1 1.2 Angle related to triangle
Why do you have to prove it when reading and thinking?
1 1.3 sum of polygons and their internal angles
Mathematical activities
summary
Review questions 1 1
Chapter 12 congruent triangles
12. 1 congruent triangles
12.2 Determination of Triangular Congruence
Using information technology to explore the conditions of triangle congruence
Properties of 12.3 bisector
Mathematical activities
summary
Review questions 12
Chapter 13 Axisymmetric
13. 1 axisymmetric
13.2 draw an axisymmetric figure
Application of information technology in axisymmetric pattern design
13.3 isosceles triangle
The unequal relationship between the sides and angles of a triangle is explored experimentally.
13.4 the shortest path problem of project learning
Mathematical activities
summary
Review questions 13
Chapter 14 multiplication and factorization of algebraic expressions
14. 1 multiplication of algebraic expressions
14.2 multiplication formula
Reading and Thinking about Yang Hui Triangle
14.3 factorization
Mathematical activities
summary
Review questions 14
Chapter 15 Scores
15. 1 score
15.2 decimal operation
Reading and thinking. The water in the container can be emptied.
15.3 fractional equation
Mathematical activities
summary
Review questions 15
Index of some Chinese and English words
If A and B represent two algebraic expressions and B contains letters, then the formula A/B is called a fraction.
The numerator of a fraction is multiplied by the denominator or divided by an algebraic expression that is not equal to 0, and the value of the fraction remains the same.
Law of fractional multiplication: fractional multiplication, the product of molecules is the numerator of the product, and the product of denominator is the denominator.
Law of fractional division: a fraction is divided by a fraction, and the numerator and denominator of the divisor are in turn multiplied by the divisor.
Fractional power should be numerator and denominator respectively.
a^-n= 1/a^n (a？ 0) that is to say, a-n (a? 0) is the reciprocal of n.