AMC 8 1998 Problem 20

AMC8 1998 年第 20

变换与对称★★★☆☆
Problem Let PQRSPQRS be a square piece of paper. PP is folded onto RR and then QQ is folded onto SS. The area of the resulting figure is 9 square inches. Find the perimeter of square PQRSPQRS.
PQRSPQRS 为一张正方形纸。将 PP 折到 RR 上,再将 QQ 折到 SS 上。所得图形的面积为 9 平方英寸。求正方形 PQRSPQRS 的周长。

正确答案 · Correct Answer

D

解析 · Solution

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