AMC8 2012

AMC8 2012 · Q5

AMC8 2012 · Q5. It mainly tests Area & perimeter.

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 $X$, in centimeters?

在图中，所有角都是直角，边长以厘米为单位给出。注意图未按比例绘制。$X$ 是多少厘米？

(A) 1 1

(B) 2 2

(D) 4 4

(E) 5 5

Answer

Correct choice: (E)

正确答案：（E）

Solution

Error creating thumbnail: Unable to save thumbnail to destination $1 + 1 + 1 + 2 + X = 1 + 2 + 1 + 6\\ 5 + X = 10\\ X = 5$ Thus, the answer is $\boxed{\textbf{(E)}\ 5}$.

$1 + 1 + 1 + 2 + X = 1 + 2 + 1 + 6$ $5 + X = 10$ $X = 5$ 因此，答案是 $\boxed{\textbf{(E)}\ 5}$。

Topics

GE.007 Area & perimeter