单选题
Triangular garden ABC is redesigned by increasing the length of AC by 20 percent to point C’and decreasing the length of AB by20 percent to point B’．
Triangular garden ABC is redesigned by increasing the length of AC by 20 percent to point C’and decreasing the length of AB by20 percent to point B’．
【正确答案】
A
【答案解析】重新设计三角形花园ABC，使其AC边长增加20%到C’点；AB边长减少20%到B'点。
从表面上看，好像是变化前后花园的面积大小不变，但是若考生根据题意列出方程就可发现，变化后花园的面积是减小了：
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从表面上看，好像是变化前后花园的面积大小不变，但是若考生根据题意列出方程就可发现，变化后花园的面积是减小了：
[*]