There are two same trangles ABC and DEF overlapped.What`s the area of shadow?人工翻译,不要用电脑!
问题描述：
There are two same trangles ABC and DEF overlapped.What`s the area of shadow?人工翻译,不要用电脑!
答
两个全等的△ABC和△DEF重叠,求阴影部分面积.