如图,在平行四边形
中,以对角线
为直径的
分别交
于M,N.若
,则
的长度为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/5b81d3c1-ef11-4c50-bde2-12540feeaa1c.png?resizew=166)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae35094f49661e98eb16af24f1051d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/5b81d3c1-ef11-4c50-bde2-12540feeaa1c.png?resizew=166)
A.12 | B.15 | C.![]() | D.![]() |
更新时间:2022-12-13 20:18:15
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【推荐1】如图,在边长为6的正方形
中,E、F分别是边
、
上的点,且
,连接
、
交于点G,在
延长线上取一点P,使
,连接
,则下列结论正确的有( )
①
,②
,③
,④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e638fba9633688cc9b0fff87b3b48144.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/8a15d323-1065-476e-ab30-8fc61c109876.png?resizew=193)
![](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/3c55b2b4781868b17719265fcb48b4a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a219673106a956a968dd5a78ba6ff1c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e22ba3e6e1c1d6b12d9b8baa8d1f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7bb9120f387b7619bcda049da191c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c030d8a83f4587dcad4a889157bdf895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e638fba9633688cc9b0fff87b3b48144.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/8a15d323-1065-476e-ab30-8fc61c109876.png?resizew=193)
A.1个 | B.2 | C.3个 | D.4个 |
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【推荐2】如图,△ABC中,∠ACB=90°,AC=2,BC=3.设AB长是
,下列关于
的四种说法:①
是无理数;②
可以用数轴上的一个点来表示;③
是13的平方根;④
.其中所有正确说法的序号是()
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/40ff0056-1275-4077-98c6-54af0f3b3a19.png?resizew=224)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11308514b59965dba0eca4ad7861473b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/40ff0056-1275-4077-98c6-54af0f3b3a19.png?resizew=224)
A.①② | B.①③ | C.①②③ | D.②③④ |
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【推荐1】如图,在
中,
,
是
的中点,EC//AB,DE//BC,
与
交于点
,则下列结论中,不一定成立的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/0af52dbe-4390-4d10-8a39-d6b075d1a565.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9285d2f630ff8a4c58ff3504fee334ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/0af52dbe-4390-4d10-8a39-d6b075d1a565.png?resizew=139)
A.![]() | B.![]() |
C.AD//EC且![]() | D.![]() |
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【推荐2】如图,四边形
是平行四边形,点E在
边上,
,连接
交
于点F,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/086147ab-fc25-4315-bb83-7265e75d89fd.png?resizew=216)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb5a2fb856430b29a6369ec01df97472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf1cb33a5329b4d63c2f1ed52121be5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/086147ab-fc25-4315-bb83-7265e75d89fd.png?resizew=216)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,
为
的直径,
与
相切于点
,交
的延长线于点
,且
.若
,则
半径长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d365cc7ce9022654091eee60bc1c2b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f01c4faacedfe56f5127d6c0cc63cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在圆O上有定点C和动点P,位于直径AB的异侧,过点C作CP的垂线,与PB的延长线交于点Q,已知:圆O半径为
,tan∠ABC=
,则CQ的最大值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/23/23e7793d-cf52-45ff-b6af-6dc14d23ea19.png?resizew=196)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/23/23e7793d-cf52-45ff-b6af-6dc14d23ea19.png?resizew=196)
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【推荐1】如图,⊙O是△ABC的外接圆,已知AD平分∠BAC交⊙O于点D,AD=5,BD=2,则DE的长为( )
![](https://img.xkw.com/dksih/QBM/2016/2/23/1573975130193920/1573975137697792/STEM/0d1821fe858742c2a68df0ff3a4841e0.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1573975130193920/1573975137697792/STEM/0d1821fe858742c2a68df0ff3a4841e0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,CB=CA,∠ACB=90°,点D在边BC上(与B、C不重合),四边形ADEF为正方形,过点F作FG⊥CA,交CA的延长线于点G,连接FB,交DE于点Q,对于下列结论:①AC=FG;②四边形CBFG是矩形;③△ACD∽△FEQ.其中正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986257910300672/2989896969240576/STEM/a6e985de-7c28-4afb-995a-d18c7c568504.png?resizew=145)
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986257910300672/2989896969240576/STEM/a6e985de-7c28-4afb-995a-d18c7c568504.png?resizew=145)
A.①②③ | B.①② | C.①③ | D.②③ |
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