正ｎ棱锥三个特征角的关系２２２２２１江苏灌云县杨集中学孟凡才本文旨在给出正ｎ棱锥三个特征角之间的依存关系，并利用其关系解决高考数学竞赛中的有关问题．命题设正ｎ棱锥的侧面与底面所成的二面角是α，侧棱与底面所成的角为β，两相邻侧面所成二面角为γ，则有：他... The relationship between three characteristic angles of positive n-pyramids 222221 Yang Guanxue, Meng Fancai, Guanyun County, Jiangsu Province The purpose of this paper is to give the relationship between the three characteristic angles of the positive n-pyramid, and to use its relationship to solve the problems in the college mathematics contest. The proposition is to set the dihedral angle formed by the side and bottom of the positive pyramid to be α, the angle formed by the side edge and the bottom surface is β, and the dihedral angle formed by two adjacent sides is γ, then: he...