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勾股定理提示了直角三角形三边之间的关系,其逆定理则是判定三角形是否为直角三角形的一种有效方法,怎样根据题目中的已知条件来选用这两个定理呢?本文根据题目中的不同条件介绍一些选择思路,愿同学们从中学到一些思考方法。
The Pythagorean theorem suggests the relationship between the three sides of a right-angled triangle. The inverse theorem is an effective way to determine whether a triangle is a right-angled triangle. How to use the two theorems according to the known conditions in the topic? The different conditions in the introduction of some ideas, I hope the students learn from some of the ways of thinking.