如图,在中,
,
,
的平分线
交
于点
,
于点
,交
于点
,连接
,
.下列结论:①
;②四边形
是菱形;③
;④
.上述结论中正确的序号是( )
A.①②③ | B.②③④ | C.①②④ | D.①②③④ |
更新时间:2024-03-27 11:50:07
|
相似题推荐
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【推荐1】如图,在
中,
,
,
平分
交
于点
,
交
延长线于点
,
交
的延长线于点
,连接
.则下列结论:①
;②
;③
;④
;⑤
其中不正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84be64d28b1623e71ad989f37336b1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba870ac7e456d8daa098c9d52aeccc2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22b02f6c8636152aeb62d191251e931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f07015a11b7ef7e6e834ca04cad836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b79bd64034539d00b1a5325461b321a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a519c8ae95be9cc109e8bd140bc7d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
A.3 | B.2 | C.1 | D.0 |
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【推荐2】如图,点P、Q分别是边长为4cm的等边△ABC的边AB、BC上的动点(其中P,Q不与端点重合),点P从顶点A,点Q从顶点B同时出发,且它们的速度都为1cm/s,连接AQ、CP交于点M,下列结论:①AQ=CP;②∠CMQ的度数等于60°;③当△PBQ为直角三角形时,t=
秒.其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/cb3111b9-89dc-4e35-b82f-a5e2bb658403.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/cb3111b9-89dc-4e35-b82f-a5e2bb658403.png?resizew=145)
A.0个 | B.1个 | C.2个 | D.3个 |
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【推荐1】如图,在Rt△ABC中,∠C=90°,AC=BC=8.点F是AB边的中点,点D、E分别在AC、BC边上运动,且保持AD=CE,连接DE、DF、EF,在此运动变化的过程中,下列结论:①△DFE是等腰直角三角形;②四边形CDFE不可能为正方形,③DE长度的最小值是4;④四边形CDFE的面积保持不变,⑤△CDE面积的最大值为8.其中正确的结论是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/8f6a1ba5-cfad-4ef9-beb0-1d091d6d3015.png?resizew=200)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/8f6a1ba5-cfad-4ef9-beb0-1d091d6d3015.png?resizew=200)
A.①②③ | B.①④⑤ | C.③④ | D.③④⑤ |
您最近一年使用:0次
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【推荐2】如图,在
中,
,
,以
,
为边向外作正方形
与正方形
,作
,
的反向延长线与
交于点
,连接
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421456e82c859184328587723f85034d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.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/3a34fdf9e6d2d87d01ad0bbb6a73ee05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed46a014ece6a0830c7c8b8deb2c56e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】如图1,四个全等的直角三角形围成一个大正方形,中间是个小正方形,这个图形是我国汉代赵爽在注解《周髀算经》时给出的,人们称它为“赵爽弦图”.在弦图中(如图2),连接
,并延长
交
于点K,连接
.若
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/00e448ac-929b-4c64-8b9a-230c4c5825df.png?resizew=254)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac8d18288dc7216f3a460a049a08e6d.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/18bbf26fadcc5aa1c44679f775768d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6825f4dadc23360183c334f89f1900bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18bbf26fadcc5aa1c44679f775768d77.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/00e448ac-929b-4c64-8b9a-230c4c5825df.png?resizew=254)
A.![]() | B.2 | C.![]() | D.![]() |
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【推荐2】如图,Rt△ABC中,∠B=90°,AB=6,BC=8,D是斜边AC上一个动点,过点作DE⊥AB于E,DF⊥BC于F,连接EF.在D点的运动过程中,给出下列结论:①当D运动到AC中点时,EF=5;②EF的最小值是
;③AE2+EB2+BF2+FC2的值恒为100;④当AD:DC=3:4时,四边形BEDF为正方形.⑤设DF的长度为x,矩形BEDF的周长为y,则y与x的函数关系式是y
x+12.其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/e57799ce-9cde-4660-b85a-fc02d91860f7.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4be6c176f36f0922f845c730b2e87193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c70c0c5a061195b9941796b6a9acc4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/e57799ce-9cde-4660-b85a-fc02d91860f7.png?resizew=145)
A.①②③ | B.①②④ | C.①④⑤ | D.①②④⑤ |
您最近一年使用:0次
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【推荐1】如图,四边形
与
不平行,
.
为四边形
的对角线,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba48b5a4d2e93f08a64aef40cfce284.png)
分别是
的中点下列结论:①
;②四边形
是矩形;③
平分
④
;⑤四边形
是菱形.其中正确的个数是 ( )
![](https://img.xkw.com/dksih/QBM/2020/5/12/2461197169377280/2462037908185089/STEM/b1a0607f463e4763800072128ec5aa0d.png?resizew=315)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5d71a21fbe403d43bc27c720774205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba48b5a4d2e93f08a64aef40cfce284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0f067a2a348ceb24a408f82992eab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b5de46d5b3b93018097a8a1f26447c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846b1b49f05812b0761eb565062d32f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48f224260ed7d0fcaa37da44323a27b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a86ada885626e030461cce4738ac2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://img.xkw.com/dksih/QBM/2020/5/12/2461197169377280/2462037908185089/STEM/b1a0607f463e4763800072128ec5aa0d.png?resizew=315)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,折叠
,折痕经过点
,交
边于点
,点
落在
的延长线上的点
处,点
落在点
处,得到四边形
,若
的面积为8,有以下结论:
①
;
②若
,则四边形
是菱形;
③设四边形
的面积为
,四边形
的面积为
,则
与
的函数关系式为
;
④若
,则点
到
的距离为1.
其中正确的个数为( )
![](https://img.xkw.com/dksih/QBM/2021/10/9/2825664442777600/2829916435398656/STEM/7d81317a-03b9-48bb-99ad-ff0c043782ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/85125122c8c0c96a3db50b80ad06d360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a109c829d652632a88ade6924fcda206.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6698d3452602370e219ec33b4882441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85125122c8c0c96a3db50b80ad06d360.png)
③设四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85125122c8c0c96a3db50b80ad06d360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a59a7d30b877db63279f0b44184da40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaf5ce545f730d8e8d0ecb661a112bc.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
其中正确的个数为( )
![](https://img.xkw.com/dksih/QBM/2021/10/9/2825664442777600/2829916435398656/STEM/7d81317a-03b9-48bb-99ad-ff0c043782ce.png)
A.4 | B.3 | C.2 | D.1 |
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