如图,有一块边长为10米的正方形草地,在这块正方形草地的一组相对的顶点上各有一颗大树,每棵大树上都用绳子拴着一只羊,绳子的长都是10米。两只羊都能吃到草的草地面积是( )平方米(大树的树干忽略不计)。
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/18/d0f73a60-9744-4371-9223-86d1e34f06b4.png?resizew=134)
A.114 | B.57 | C.86 | D.43 |
更新时间:2023-10-14 19:21:59
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【推荐1】如图,四边形ABCD,AEFG,BIHE都是平行四边形,且E是DC的中点,点C在HI上.
GDA,
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BCI的面积依次记为
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,则( ).
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A.![]() ![]() ![]() ![]() | B.![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() | D.![]() ![]() ![]() ![]() |
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【推荐2】如图,以直角三角形ABC的两条直角边为直径作两个半圆,已知这两段弧的长度之和是43.96厘米,那么△ABC的面积最大是( )平方厘米(π取3.14)
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【推荐1】如图,大圆内画一个最大的正方形,正方形内画一个最大的圆…,如此画下去,共画了4个圆.那么,最大的圆的面积是最小的圆的( )倍。
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【推荐2】下图所示的三个正方形的边长都相等,图中涂色部分的面积依次用S1,S2,S3表示,把面积按从大到小排列是( )。
A.S1>S2>S3 | B.S1>S3>S2 | C.S2>S1>S3 | D.S3>S1>S2 |
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