选C ,我们有这道题,带答案的,绝对没错.
它的意思是以图形中所有全等三角形的交点为顶点的直角三角形有几个?
很拗口,但原翻译比这更拗口,我加入了自己的理解.
If the figure 6 is composed of 24 equilateral triangles ,the
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