勾股定理是举世闻名的定理.它在解决直角三角形问题中有着非凡的作用,也是中考命题的热点之一.一、由两边求第三边例1(扬州市2005年中考题)如图1,学校有一块长方形花圃,有极少数人为了避开拐角走“捷径”,在花圃内走出了一条“路”.他们仅仅少走了步路(假设2步为1m),却踩伤了花 The Pythagorean theorem is a world-famous theorem. It has an extraordinary role in solving the right-angle triangle problem and is also one of the hot spots in the examination proposition. First, the third side of the case 1 from the two sides (Yangzhou 2005 examination questions) Figure 1 There is a rectangular garden in the school. A handful of people take a “shortcut” to avoid corners and walk out of the road in the flower garden. They just walked a little less (assuming 2 steps of 1m) but they hurt their flowers.