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“三射线定理”,是作者在长期立体几何教学实践基础上,总结归纳命名的.该定理可视为著名的三垂线定理的推广,有着更广泛的应用,利用它可以简洁地解决立体几何中一批基本问题.该文颇有新意,值得一读.
“Three-ray theorem” is the author’s summarization and induction on the basis of the long-term practice of solid geometry teaching. The theorem can be regarded as a popularization of the famous three-perpendicular theorem. It has a wider range of applications and can be used to solve stereoscopic geometry in a concise manner. A batch of basic questions. This article is quite new and worth reading.