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今年高考数学试题中,立体几何内容在难度上和份量上比往年都有所提高。理工科第八题考查了“直线和平面”一章的许多主要概念和定理,如异面直线所成的角,二面角的平面角,直线和平面所成的角,直线和平面垂直、平面和平面垂直的有关定理等。试题要求考生首先能正确地添置七条辅助线,画出完整的空间图形,然后综合应用几何、三角知识计算出结果,在运算过程中,对有关直线、平面的位置关系要有严格的推
In this year’s college entrance examination mathematics test, the content of the three-dimensional geometry has been improved in difficulty and weight compared to previous years. The eighth question of the Department of Science and Engineering examines many of the main concepts and theorems of the “Linear and Plane” chapter, such as the angle formed by the straight lines of different sides, the plane angle of the dihedral angle, the angle formed by the straight line and the plane, and the straight line and the vertical plane. Plane and plane vertical related theorems. Questions require candidates to first correctly add seven auxiliary lines, draw a complete spatial pattern, and then use a combination of geometric, triangular knowledge to calculate the results, in the calculation process, the location of the relevant lines, planes must have a strict push