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勾股定理在初中数学中是一个非常重要的定理,常用于解直角三角形试题,涉及到边的计算、角的计算、直角三角形的判定、实际应用等题型,解题时,需要仔细观察题目的特点,深入挖掘其内涵条件,构造出符合条件的直角三角形,现举例其在中考的一些妙用.一、利用旋转变换构造直角三角形例1(2011年湖北省黄冈市)如图1,在等腰三角形ABC
The Pythagorean theorem is a very important theorem in junior high school mathematics. It is often used to solve the right triangle test, which involves the calculation of the side, the calculation of the angle, the judgment of the right triangle, and the practical application of the questions. The characteristics of digging its connotation, to construct a right-angled triangle, is now an example of some of its magical effect in the test.First, the use of rotational transformation to construct a right-angled triangle Example 1 (Huanggang City, Hubei Province in 2011) as shown in Figure 1, etc. Waist triangle ABC