I myself didn't feel very well that it wasn't entirely clear and convincing. Perhaps next time it would be better to solve this problem either with some prisms that could be divided into necessary parts, or with some mass that could be directly "cut" and combined into a whole, or show them with a presentation in PP. In the feedback with my accompanying teacher, I also realized that I had misused some mathematical expressions (cube content - instead of surface).
Perhaps next time it would be better to solve this problem either with some prisms that could be divided into necessary parts, or with some mass that could be directly "cut" and combined into a whole, or show them with a presentation in PP.