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勾股定理是数学中一个很重要的定理,它揭示了直角三角形三边长的内在联系,反映了三边之间特殊的平方关系,它为利用计算的方法研究图形的性质提供了新途径,因此应用十分广泛,但在应用勾股定理解题时,初中学生常常会出现这样或那样的错误,归纳起来,大致有以下几种,现举例剖析如下,供初中师生教与学时参考.一、忽视题目所给条件。分不清直角三角形的斜边和直角边例1在Rt△ABC中,∠A=90°,a=13cm,b=5cm,
Pythagorean theorem is a very important theorem in mathematics. It reveals the intrinsic relationship between the three sides of a right-angled triangle and reflects the special square relationship between the three sides. It provides a new way for studying the nature of graphs using computational methods. Therefore, the application is very extensive, but when applying comprehension questions, junior high school students often have one or the other error, which can be summed up in the following categories. The following examples are provided for the reference of junior middle school teachers and students. , Ignore the conditions given by the topic. Cannot tell the oblique and right-angled sides of a right triangle. Example 1 In Rt △ ABC, ∠A=90°, a=13cm, b=5cm,