【数论问题】 1.难度:★★ 比较图中的两个阴影部分①和②的面积,它们的大小关系______
2.难度:★★
右图中,矩形file:///C:/Users/PC/AppData/Local/Temp/msohtmlclip1/01/clip_image002.gif的边file:///C:/Users/PC/AppData/Local/Temp/msohtmlclip1/01/clip_image004.gif为file:///C:/Users/PC/AppData/Local/Temp/msohtmlclip1/01/clip_image006.gif厘米,file:///C:/Users/PC/AppData/Local/Temp/msohtmlclip1/01/clip_image008.gif为file:///C:/Users/PC/AppData/Local/Temp/msohtmlclip1/01/clip_image010.gif厘米,三角形file:///C:/Users/PC/AppData/Local/Temp/msohtmlclip1/01/clip_image012.gif比三角形file:///C:/Users/PC/AppData/Local/Temp/msohtmlclip1/01/clip_image014.gif的面积大file:///C:/Users/PC/AppData/Local/Temp/msohtmlclip1/01/clip_image016.gif平方厘米,求file:///C:/Users/PC/AppData/Local/Temp/msohtmlclip1/01/clip_image018.gif的长.
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