AMC 8 1989 Problem 24

AMC8 1989 年第 24 题

四边形与多边形★★★★☆

Suppose a square piece of paper is folded in half vertically. The folded paper is then cut in half along the dashed line. Three rectangles are formed-a large one and two small ones. What is the ratio of the perimeter of one of the small rectangles to the perimeter of the large rectangle?

假设一张正方形纸被垂直对折。折叠后的纸再沿虚线切成两半。形成三个矩形——一个大矩形和两个小矩形。一个小矩形的周长与大矩形的周长之比是多少？

AMC 8 1989 Problem 24 figure

A. $\displaystyle \frac{1}{2}$
B. $\displaystyle \frac{2}{3}$
C. $\displaystyle \frac{3}{4}$
D. $\displaystyle \frac{4}{5}$
E. $\displaystyle \frac{5}{6}$

正确答案 · Correct Answer

E

解析 · Solution

解析整理中

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