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Between two concentric circles, one with radius r and another with radius (r+2)
Quantity A
The area of the smaller circle with radius r
Quantity B
The area of the region between these two concentric circles
D显示答案
· 相关考点
4.5.2 圆的周长与面积
4.5.2 圆的周长与面积
以上解析由 考满分老师提供。
