Solid geometry is not difficult. The hardest part is conic curve and derivative. If you can chew down these two hard bones, then your math in the college entrance examination will be above 130.

If you are not good at solid geometry, I will tell you some learning methods:

First of all, you have to understand the theorem thoroughly. The standard is to look at a picture without looking at the topic, and you will know what the problem is about and what the theorem needs.

Then learn the vector solution of solid geometry well. 90% of solid geometry can be solved by vectors, and it is not easy to make mistakes, and you don't have to recite so many theorems (however, memorizing theorems can help you solve problems quickly, because vectors are very simple but the format is very strict, bad writing will lead to points deduction, and there are many things to write, so the college entrance examination doesn't waste you so much time, and the time to solve a solid geometry problem is 10 ~.

Then do more questions. Of course, if you write the question and the answer correctly, you can't just look at the last number, but also compare it with the answer step by step. If it is still poor, remind yourself with a red pen that you will do the problem again one day and compare it with the answer until it is the same as the answer. This will ensure that you will not be wronged. Go your own way, it is not too much to deduct 3 points from a question. Don't feel that 3 points are missing, and talk about the latter question.

I hope I can help you.