All the mathematical theorems from junior high school to senior high school

All the mathematical theorems from junior high school to senior high school

1. There is only one straight line passing through two points. 2. The shortest line segment between two points. 3. The complementary angles of the same angle or equal angle are equal. 4. The complementary angles of the same angle or equal angle are equal. 5. There is only one straight line passing through one point and the known straight line is vertical. 6. Among all the line segments connected by a point outside the straight line and each point on the line, the shortest vertical line segment is 7. The axiom of parallel passing through the straight line