如果一个正方形的四个顶点都在一个三角形的三条边上,则称该正方形是该三角形的内接正方形.历年的中考试题中,常常出现相似问题和正方形“交织”在一起的考题,我们在解题时既要考虑相似三角形的性质与判定,又要考虑正方形的性质问题.一、求边长例1已知正方形DEFG内接于△ABC If all four vertexes of a square are on the three sides of a triangle, the square is called the inscribed square of the triangle. Similar questions often appear in the mid-year exam questions with the square “intertwined” We have to consider both the nature and the determination of similar triangles in the problem-solving, but also consider the nature of the square. First, find the length of Example 1 known square DEFG inscribed in △ ABC