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数学解题中,一题多解作为培养学生创新思维、创新意识的有效方式,应该得到数学教师的充分重视,为学生的发展与创造奠定基础;同时能够培养学生从不同角度、不同侧面分析问题和解决问题的能力。下面,我以“三角形中的几何计算”题目解答为例简作说明,以飨读者。北师大版必修5数学第二章《三角形中的几何计算》。例1.在题型ABCD中,AD∥BC,AB=5,AC=9,∠BCA=30°∠ADB=45°,求BD的长?
As one effective way to cultivate students' innovative thinking and innovative consciousness, one problem and multiple solutions should pay full attention to mathematics teachers and lay the foundation for the development and creation of students. At the same time, it can help students to analyze problems from different perspectives and from different sides And ability to solve problems. Below, I “Geometry in the triangle ” answer the title of a simple example to 飨 readers. Beijing Normal University edition of 5 math Chapter 2 “geometric calculations in the triangle.” Example 1. In the question ABCD, AD∥BC, AB = 5, AC = 9, ∠ BCA = 30 ° ∠ ADB = 45 °, seeking BD long?