巧用面积比解题

对于一个题目，寻求不同的证明方法，既能活跃思维，开拓思路，加深对问题的认识，又能检验掌握知识的深度、广度和灵活运用知识的能力。在几何、代数、三角中，对一些问题的证明，借助于图形面积比的关系，常常是解决问题的一种锐利武器。

Apply the area dexterously to solve problems

For one question, to seek for look for different proving methods not only can make the thinking active and widen the thinking and deepen the understanding to the question, but also can examine the profundity and extent of mastering the knowledge and the ability to apply the knowledge. In the geometry, algebra and trigonometry, it is always one sharp arm for solving problems to prove some problems, depending on the relation of the graphics area ratio.