AMC10 2012 A
AMC10 2012 A · Q2
AMC10 2012 A · Q2. It mainly tests Area & perimeter.
A square with side length 8 is cut in half, creating two congruent rectangles. What are the dimensions of one of these rectangles?
一个边长为8的正方形被切成两半，得到两个全等的矩形。其中一个矩形的尺寸是多少？
(A)
2 by 4
2 × 4
(B)
2 by 6
2 × 6
(C)
2 by 8
2 × 8
(D)
4 by 4
4 × 4
(E)
4 by 8
4 × 8
Answer
Correct choice: (E)
正确答案：（E）
Solution
The length of each rectangle is equal to the side length of the square. The width of each rectangle is half the side length of the square, so the rectangle’s dimensions are 4 by 8.
每个矩形的长度等于正方形的边长。每个矩形的宽度是正方形边长的一半，因此矩形的尺寸是4乘8。
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