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What to learn in the first volume of mathematics in the second day of junior high school
The first volume of Senior Two is: triangle, congruent triangles, axis symmetry, multiplication and division of algebraic expressions, factorization and fraction.

The second volume of Grade Two is quadratic root, Pythagorean theorem, quadrilateral, linear function, data analysis.

Mathematics Mathematics is a discipline that studies the concepts of quantity, structure, change, space and information, and belongs to a formal science from a certain point of view.

Mathematics is produced by counting, calculating, measuring and observing the shape and motion of objects through abstract and logical reasoning. In many countries and regions, mathematics has become a part of education. It is applied in different fields, including science, engineering, medicine, economy and finance. Mathematicians also study pure mathematics, which is the substantive content of mathematics itself and does not aim at any practical application.