The detailed explanation catalogue of mathematics in the new textbook of the eighth junior high school of People's Education Press.
(
62
)
sequence
1 1
return
Triangle (
eight
)
1 1. 1
Line segments associated with triangles (
2
)
1 1. 1. 1
The edge of a triangle
1 1. 1.2
The height, midline and angular bisector of a triangle.
1 1. 1.3
Stability of triangle
Information technology application
Draw a picture to find the law
1 1.2
The angle associated with a triangle (
three
)
1 1.2. 1
Interior angle of triangle
7.2.2
The outer corner of a triangle
Reading and thinking
Why do you want to prove it?
1 1.3
The sum of polygons and their internal angles (
2
)
1 1.3. 1
polygon
1 1.3.2
Sum of interior angles of polygons
Mathematical activities
Abstract (
1
)
sequence
12
return
Congruent triangles (
1 1
)
12. 1
Congruent triangles (
1
)
12.2
Determination of triangle congruence (
six
)
Information technology application
Exploring the conditions of triangle congruence
12.3
The nature of the bisector of an angle (
2
)
Mathematical activities
Abstract (
2
)
sequence
13
return
Axisymmetric (
14
)
13. 1
Axisymmetric (
three
)
13. 1. 1
Axial symmetry
13. 1.2
Properties of vertical line in line segment
13.2
Draw an axisymmetric figure (
2
)
Information technology application
Axisymmetric pattern design