AMC 8 1990 Problem 18
AMC8 1990 年第 18 题
立体几何★★★☆☆
Each corner of a rectangular prism is cut off. Two (of the eight) cuts are shown. How many edges does the new figure have?
一个长方体每个角都被切掉了。显示了八个切口中的两个。新图形有多少条棱？
- A.24
- B.30
- C.36
- D.42
- E.48
正确答案 · Correct Answer
C
解析 · Solution
Solution 1
The new figure retains the middle part of each of the 12 edges of the cube and gains 3 new edges from each cut. Therefore, the new figure has edges.
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