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一个简单的问题,如果将其条件或结论稍微改变一下,就会变为一个新的不再简单的问题,探讨这个新问题,可以给我们带来新的收获和启示,例如:题目1在Rt△ABC中,BA⊥AC,AD⊥BC于点D,E为BC的中点,求证:∠BAD=∠CAE.这是一个平凡的命题,容易证得.但若将条件和结论稍微调换一下,便得到最近在QQ群中被频繁问到的一道题:
A simple question that turns its condition or conclusion a little bit to a new one is no longer a simple question. Exploring this new question can bring us new gains and insights, for example: Topic 1 In Rt △ ABC, BA ⊥ AC, AD ⊥ BC at point D, E is the midpoint of BC, verify: ∠ BAD = ∠ CAE. This is an ordinary proposition, easy to prove, but if the conditions and conclusions slightly swap , They have been recently asked in the QQ group frequently asked a question: