What are the contents of junior high school mathematics?

Junior high school mathematics mainly includes algebra and geometry.

The knowledge points of numbers and algebra mainly include rational numbers, real numbers, algebras, algebras, fractions, linear equations of one variable, linear equations of two variables, linear inequalities of one variable, linear functions, inverse proportional functions and quadratic functions.

The knowledge points of geometry include line segments, angles, intersecting lines, parallel lines, triangles, quadrilaterals, similar shapes, circles and so on.

The algebra part mainly includes:

Real numbers, algebraic expressions (algebraic, quadratic), equations (linear, quadratic, quadratic, fractional), inequalities, functions (proportional, linear, inverse proportional, quadratic).

The geometry part mainly includes:

Geometric preliminary (lines are angular parallel lines), triangle (understanding and properties of triangles, right triangle, isosceles triangle, congruent triangles, similar triangles, acute trigonometric function), quadrilateral (parallelogram, rectangle, diamond, square), circle, solid graphic foundation and graphic three major changes (translation, rotation and symmetry).