1993 AMC 8 第 17 题
先试着解答 1993 AMC 8 第 17 题，然后核对你的答案与精心整理的解答，解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 1993 AMC 8 解答，或核对答案。
所有题目均经美国数学协会（MAA）官方合法授权使用。
17.
从一张 单位乘 单位的长方形硬纸板上切去四个边长为 单位的角正方形，然后把四边折起形成一个无盖盒子。盒子内部表面积是多少平方单位？
Square corners, units on a side, are removed from a unit by unit rectangular sheet of cardboard. The sides are then folded to form an open box. The surface area, in square units, of the interior of the box is
小提示：
折叠不改变面积；内部表面积等于纸板面积减去四个角正方形
Folding does not change area; the interior surface equals the sheet minus the four corner squares
大提示：
原纸板面积是 ，再减去四个 的角正方形
The sheet is subtract four corner squares
解答：
盒子内部表面正好是切去四角后纸板的一面。原纸板面积为 ，每个被切去的角面积为 。
所以内部表面积是 。
所以正确答案是 B。
The interior surface is exactly one face of the cardboard after the corners are removed. The sheet has area and each removed corner has area
So the interior surface area is
Thus, the correct answer is B .
其他年份的第 17 题
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