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1.旋转类题目这类题目通常给定了旋转方向和旋转角度.例1 如图1,在△ABC 中,将△ABC 绕点C顺时针旋转180°,得到△FEC.试猜想 AE 与 BF有何关系?说明理由.分析旋转前、后图
1. Spinning topics These problems are usually given the direction of rotation and rotation angle. Example 1 In Figure 1, in △ ABC, △ABC is rotated 180° clockwise around point C to obtain △FEC. Try to guess AE and BF. What is the relationship? Explain the reason. Analyze the rotation before and after the figure