立体几何中求体积的若干方法（苏教版）

• 作 者: 常俊
• 机 构: 南京市建邺高级中学,
• 出 处: 新课程(下)
• 发表日期: 2015年10期
• 关键词: 立体几何 体积 方法 理解和掌握 题型 学生 江苏 高考

江苏高考中求立体几何体积是常考的题型也是必考的题型,需要学生认真理解和掌握.现将常用的几种方法总结如下.【直接法】对于课本中的简单几何图形,我们只要找出公式中相对应的参数,直接运用公式求解.【例】已知正方体ABCD-A1B1C1D1的棱长为2,O为底面正方形ABCD的中心,求三棱锥B1-BCO的体积.

In the college entrance examination of Jiangsu, the volume of the three-dimensional geometry is often used as a test item and it is a question that must be considered. It requires students to carefully understand and master. Several methods that are commonly used are summarized as follows. [Direct Method] For the simple geometry in the textbook, we As long as the corresponding parameters in the formula are found, the equation is directly used to solve the problem. [Example] The length of the known cube ABCD-A1B1C1D1 is 2, O is the center of the bottom square ABCD, and the volume of the triangular pyramid B1-BCO is found.