2005 AMC 8 第 4 题
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4.
一个正方形和一个三角形周长相等。三角形的三边长分别是 cm、 cm 和 cm。正方形的面积是多少平方厘米?
A square and a triangle have equal perimeters. The lengths of the three sides of the triangle are cm, cm and cm. What is the area of the square in square centimeters?
小提示:
先求三角形的周长
First find the triangle’s perimeter.
大提示:
这个周长也是正方形的周长
That perimeter is also the square’s perimeter.
解答:
三角形的周长为 这意味着正方形的边长为 因此正方形面积为
所以正确答案是 C。
The perimeter of the triangle is This means that the side length of the square is Therefore, the area of the square is
Thus, C is the correct answer.
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