The main problems encountered are: finding the spatial distance; Find the space angle (line-plane angle, dihedral angle, angle narrowed by a straight line on different planes)-attention range
When encountering problems, the main considerations are:
1, geometric method
That is, I usually find an auxiliary county. Basically, it is considered from the aspects of parallel lines and midpoints, and then it is transformed into a plane problem.
2. Vector method
This method is relatively rigid and is generally used when the verticality or angle is known. Can be used to solve the angle problem.
3. Coordinate method
This method has a wide range of applications, and it is necessary to establish a spatial rectangular coordinate system. Compared with the geometric method, the calculation is large, but the thinking process is simple, and it is usually used when there are three perpendicular straight lines. It has a good effect in terms of distance and angle.
I am also a sophomore, and I have finished learning the chapter of solid geometry. The above are some methods after summing up. Basically, considering problems from these aspects, big problems can generally be solved. As for the choice of fill-in-the-blank questions, we should be flexible.
A little experience, I hope it will be useful.