对于能够完全重合的三角形,要使两个三角形重合,则需要搬动图形,通常是以某个三角形为基准(不动),把与其全等的另一个三角形通过平移、旋转或翻折三种方法使其与基准三角形重合。一、平移变形找全等三角形例1如图1,已知AB∥A′B′,AC∥A′C′,BB′∥CC′,求证△ABC≌△A′B′C For a triangle that can be completely coincident, to make two triangles coincide, you need to move the graphics, usually based on a certain triangle (immobility), and translate the other triangle that is equal to it, rotate, or turn it over. The method makes it coincide with the reference triangle. First, the translation deformation to find a full triangle example 1 as shown in Figure 1, known AB ∥ A ’B ’, AC ∥ A ’C ́, BB ∥ ∥ CC ́, confirmation △ ABC ≌ △ △ A’ B ́C