教材中讲,如果两个图形不仅是相似图形,而且每组对应点所在的直线都经过同一个点,那么这样的两个图形叫位似图形.由定义可以看出,位似是相似的一种特殊情形,位似图形不仅要求“似”(两个图形形状相同),而且对“位”(两个图形的相对位置)也有要求.位似图形的特征如图1,△ABC和△ In the textbook, if two figures are not only similar figures, but also the lines where the corresponding points of each group pass through the same point, then such two figures are called like figures. It can be seen from the definition that the bits are similar. In a special case, the position-like pattern not only requires “likeness” (the two shapes are the same shape), but also has a requirement for “bit” (the relative position of the two figures). The characteristics of the position-like pattern are shown in Figure 1, △ABC and △