论文部分内容阅读
平面向量体现了数与形的完美结合,利用向量求解三角形中的有关问题是向量命题的热点之一,此类问题涉及知识面广,融合三角与向量的交汇点,而且考查方法灵活,很好地体现了高考的命题思路。下面,笔者就几类问题举例说明,以飨读者。1判断三角形形状例1已知O为△ABC内一点,若对t∈R,
Plane vectors embody the perfect combination of numbers and shapes. Using vectors to solve triangles is one of the hot topics of vector propositions. Such problems involve a wide range of knowledge, the intersection of triangles and vectors, and the method of checking is flexible and very good Embodies the idea of college entrance examination ideas. Below, I give examples of several types of problems to readers. 1 to determine the triangle shape Example 1 Known as O △ △ a point, if 对 t ∈ R,