论文部分内容阅读
!勾股定理是初中数学的重要定理之一,是沟通代数与几何的桥梁,不少同学在具体运用勾股定理解题时,常出现这样那样的漏解和错解现象,现就常见错误剖析如下.一、忽视对直角三角形两条边中最长边的分类讨论例1已知一个直角三角形的两条边是3cm和4cm,求第三条边长.错解:因直角三角?
The Pythagorean Theorem is one of the important theorems of junior high school mathematics. It is a bridge to communicate algebra and geometry. Many students often appear misunderstandings and misunderstandings in the specific use of comprehension and comprehension questions. The analysis is as follows. I. Ignoring the classification of the longest side of the two sides of a right-angled triangle. Discussion Example 1 It is known that the two sides of a right-angled triangle are 3cm and 4cm, and the length of the third side is determined. Wrong solution: Due to the right-angled triangle?