2012 AMC 8 第 5 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
5.
图中所有角都是直角，边长以厘米为单位给出。注意图形不是按比例绘制的。 是多少厘米？
In the diagram, all angles are right angles and the lengths of the sides are given in centimeters. Note the diagram is not drawn to scale. What is , in centimeters?
答案：E
小提示：
分别把图形两侧的竖直长度相加。
Add the vertical lengths on each side of the shape.
大提示：
左侧和右侧的总高度必须相等。
The left and right total heights must be equal.
视频讲解：
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文字解答：
先从右侧高度相加求图形总高度，得 。
再从左侧高度相加，得 。
两个高度相同，所以 ，因此 。
所以正确答案是 E。
First, we can find the height of the object by getting the sum of the heights on the right. Therefore, the height is
Next, we can find the height of the object by getting the sum of the heights on the left. Therefore, the height is
Since the heights are the same, we know so
Thus, the answer is E .
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