The first block: real numbers. Mainly to master the classification and operation of real numbers, and the operation mode of real number operation on the calculator.

The second block: intersecting lines, parallel lines. Mainly the concept of three-line octagon and its application in practical solution.

The third block: triangle. It is mainly congruence, which is one of the most important contents of junior high school geometry. Later, I will learn a similar triangle in the third grade, which is much more complicated than congruence.

The fourth block: plane rectangular coordinate system. Get a preliminary understanding!