如图,在菱形
中,
,对角线
,
相交于点
,点
为
的中点.若
,则菱形
的面积大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863544b6162ca5c8bc38ade2fc28f8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/30/c9f3c008-6920-40c5-9f83-9c7dafb65200.png?resizew=223)
A.18 | B.![]() | C.36 | D.![]() |
更新时间:2023-05-15 20:32:05
|
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【推荐1】如图,在
中,
、
分别是
、
的中点,
,
是
上一点,连接
、
,
,若
,则
的长度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb262f3529a3e84959fe594b6628c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8600a5bbd837735bb7383eb6205396.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10787ce380382dfd1cf02255a623d80b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/5a7f50d9-03a7-4156-8126-db3371399f77.png?resizew=159)
A.11 | B.12 | C.13 | D.14 |
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名校
【推荐2】如图,在正方形
中,点E在
上,点F在
的延长线上.满足
,连接
、
,取
的中点G,连接
,
,若
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/5190ceda-467d-4505-9abf-c682838932a9.png?resizew=122)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8ceff7afec45baa273b1fe2152bbbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96cf3f9a01a810792ebacc7f5bc70e97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/5190ceda-467d-4505-9abf-c682838932a9.png?resizew=122)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】已知下列命题:①已知菱形的两条对角线长分别是a、b,则这个菱形的面积为
ab;②在Rt△ABC中,∠C=90°,若∠A>∠B,则cosA<cosB;③若m=n+1,则1﹣m2+2mn﹣n2=0;④若点A(x1,y1)和点B(x2,y2)在二次函数y=x2﹣2x﹣1的图象上,且满足x1>x2>1,则y2>y1>﹣2;其中假命题的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
A.1 | B.2 | C.3 | D.4 |
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【推荐2】菱形周长为
,它的条对角线长
, 则该菱形的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde7ecce8a793b8a5f25fc1651207b83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc78a3b284e57c70528495772abb6af5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,矩形纸片
中,点E是边
的中点,连结
,过点A对折矩形纸片,使点D落在射线
上,折痕为
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b5ca594122d17b46e6bbe0ad60c57f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e80bb0f244f283cd4c3faf809ba488d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/28/af44a98c-1c8e-4dc6-ab9f-365087a3cea3.png?resizew=102)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在Rt△ABC中,∠ACB=90°,点D是斜边AB的中点,DE⊥AC于E,若DE=2,CD=2
,则BE的长为( )
![](https://img.xkw.com/dksih/QBM/2018/12/3/2088929421344768/2090031888310272/STEM/ef630c8e4b8c421ebf48001d8323b5aa.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/2018/12/3/2088929421344768/2090031888310272/STEM/ef630c8e4b8c421ebf48001d8323b5aa.png?resizew=163)
A.4![]() | B.3![]() | C.3![]() | D.8 |
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