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上堂课老师留下两个问题: (1)在3倍放大镜下的三角形面积是原三角形面积的9倍,这是为什么? (2)用放大镜看图形,有放不大的图形吗? 现在让我告诉你当时的情况。
There are two questions left by the teacher: (1) The area of the triangle under the 3x magnifying glass is 9 times the area of the original triangle. Why is this? (2) Looking at the figure with a magnifying glass, does it have a small figure? Let it now I told you the situation at the time.