如图所有的四边形都是正方形,所有的三角形都是直角三角形,其中最大的正方形的边长为8,正方形A的面积是15,B的面积是12,C的面积是17,则D的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/48ecd999-2a43-4380-8ad0-0c2a10791f8f.png?resizew=164)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/48ecd999-2a43-4380-8ad0-0c2a10791f8f.png?resizew=164)
A.16 | B.18 | C.20 | D.22 |
更新时间:2023-05-09 20:56:09
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【推荐1】如图,在△ABC中,∠BAC=60°,∠C=45°,AC=3+3
,BD⊥AC于点D,AE平分∠BAC交BD于点E,则AE的长为( )
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【推荐2】如图,在平面直角坐标系中,四边形
为菱形,
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的坐标为( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在Rt△ABC中,∠C=90°,分别以各边为直径作半圆,图中阴影部分在数学史上称为“希波克拉底月牙”,当AC=4,BC=2时,则阴影部分的面积为( )
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【推荐2】如图,在Rt△ABC中,∠ACB=90°,以△ABC的各边为边在△ABC外作三个正方形,S1,S2,S3分别表示这三个正方形的面积,若S1=3,S2=11,则S3=( )
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