论文部分内容阅读
勾股定理反映了特殊三角形——直角三角形三边间的数量关系.我们可以按照“从特殊到一般”的思路来研究勾股定理以及相关的问题.一、勾股定理及其逆定理勾股定理反映了直角三角形三边之间的数量关系(如图1).当△ABC中∠C>90°时,三边之间的数量关系是怎样的?当△ABC中的最大角∠C<90°时呢?按照“从特殊到一
The Pythagorean theorem reflects the quantitative relationship between the three sides of a special triangle, a right-angled triangle. We can study the Pythagorean theorem and related problems according to the idea of ”from special to general". First, the Pythagorean theorem and its inverse theorem The Pythagorean Theorem reflects the quantitative relationship between the three sides of a right-angled triangle (Figure 1). When ΔCBC ∠C>90°, what is the quantitative relationship between the three sides? When △ABC is the largest angle ∠ When C<90°? Followed from special to