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例题如图1,E是正方形ABCD中CD边上任意一点,以A为中心把△ADE顺时针旋转90°,画出旋转后的图形.(人教版九年级数学上册64页)如图2,答案比较简单,是一个最基本的旋转问题.由题目
The example is shown in Figure 1. E is the arbitrary point on the CD edge in the square ABCD. Rotate ΔADE clockwise by 90° with A as the center. Draw the rotated graph. (PEPTEMGRAPH 9th grade mathematics volume 64 pages) The answer is relatively simple, it is a basic rotation problem.