如图,在
中,
,
垂直平分
,分别交线段
于点D、E,连接
,若
,
.
的长度;
(2)延长线段
使得
,连接
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887721a843b2dc8e947cc42d09868e33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0a3fa475b24f57ecd79c681259561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4107f9817489bd8938b16076df1469a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86338536656046e93b53672ade9a78b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)延长线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dacca19f76d406c300d549a5a35ce6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f92d3a98b016927de4bbb9b9564894f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d36c37267c4aeecee473d19457f585.png)
更新时间:2024-05-24 23:28:18
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在△ABC中,∠BAC=126°,MP和NQ分别是AB和AC的垂直平分线,求∠PAQ的度数.
![](https://img.xkw.com/dksih/QBM/2021/1/9/2632446902820864/2632495566446592/STEM/ad5d847c3cf349948253af29793bfbf1.png?resizew=237)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,已知
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/b2bf7930-38bb-458a-8f63-09e0d38920d3.png?resizew=176)
(1)请用尺规作图法,在
边上求作一点
,使
.(保留作图痕迹,不写作法)
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/712cd26830bae2d8e4f028f0e7f7bf4d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/b2bf7930-38bb-458a-8f63-09e0d38920d3.png?resizew=176)
(1)请用尺规作图法,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb668381695dec6ac5c74fe39fe04ac9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce9eee96f2fdffaf13d43bd51a60451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,AB=AC=3
,∠BAC=α,连接BC,点D在边BC上(点D不与B,C重合),连接AD,将线段AD绕点A逆时针旋转α得到线段AE,连接CE,DE.
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894275777396736/2950761750003712/STEM/1f9ed4fb-51e3-4cb2-91d7-b06d7b53cc3c.png?resizew=360)
(1)求证:△ABD≌△ACE;
(2)若α=90°,且AD与BD的数量关系满足AD=BD+2,求△DCE的面积;
(3)若α=60°,连接BE,试说明△ABE的面积是一个定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894275777396736/2950761750003712/STEM/1f9ed4fb-51e3-4cb2-91d7-b06d7b53cc3c.png?resizew=360)
(1)求证:△ABD≌△ACE;
(2)若α=90°,且AD与BD的数量关系满足AD=BD+2,求△DCE的面积;
(3)若α=60°,连接BE,试说明△ABE的面积是一个定值,并求出该定值.
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解答题-应用题
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适中
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【推荐2】如图,
是某地区五个县(市),实线是原来连接五个县(市)的普通公路.为了加快经济发展,该地区拟修建一条连接
三县(市)的高速公路(虚线),已知
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/b38fcf25-fbb8-42f7-895d-3182ce0972c2.png?resizew=246)
(1)若修建高速公路的建设成本为5000万元
,则该高速公路的造价预计多少万元(用科学记数法表示)?
(2)在高速公路奠基仪式上,发言人说“高速公路修成后,开车从
地到
地可以节约2个小时”.若汽车走普通公路的平均速度为
,走高速的平均速度为
,请你通过计算判断发言人的说法是否正确.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d75df9d80ce1e0b7cb50464e293864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb0e488fc13f6fa31bdb241be399cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf195b7760ab4814355960bf032fe35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637477c8f566efc1e0371af04b4d0fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cce6fdecbd5d5804da27ec2f925a513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44aa0eff96c4f551f2efdd75d949a54.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/b38fcf25-fbb8-42f7-895d-3182ce0972c2.png?resizew=246)
(1)若修建高速公路的建设成本为5000万元
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98024ce2e23a5e81b2bcdd7c96ccef9.png)
(2)在高速公路奠基仪式上,发言人说“高速公路修成后,开车从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1840a81eea34dd19991e81f21f1a85fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75386cfd1664af9a311c996d31bcde71.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,点C,F,E,B在一条直线上,
,
,
.
写出CD与AB之间的关系,并证明你的结论;
若连接AD,求证:AD,EF互相平分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/053debe4add4accccc9e0fecc3f589bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff439a446238f75c3f184e4f8dfe137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd270464fad12a629f29581580ddf57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://img.xkw.com/dksih/QBM/2018/8/21/2015363407798272/2018660027621376/STEM/8576515e65de4df7a434c08f3afeff32.png?resizew=156)
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解答题-问答题
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适中
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【推荐2】如图,在
中,
,
于点D,且
.点M从点A出发,沿
的方向匀速运动,速度为
;同时直线
由点B出发,沿
的方向匀速运动,速度为
,运动过程中始终保持
,直线
交
于点P、交
于点Q、交
于点F.连接
,设运动时间为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/f4c6ab1f-bb4c-4ebe-9040-e97f79fe81c5.png?resizew=120)
(1)填空:
___________cm,
___________cm(用含t的代数式表示)
(2)当t为何值时,四边形
是平行四边形?
(3)连接
,是否存在某一时刻t,使点M在线段
的垂直平分线上?若存在,求出此时t的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011586f46c6f0c37d0f2e85fb69bb4c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1337ce85d29edabcc2fadb9a9cc31ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2952c1bb3373bd9cb2b8c59c8ec55f4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab0a32b33346476f796ad5633ca6917.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/f4c6ab1f-bb4c-4ebe-9040-e97f79fe81c5.png?resizew=120)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9985eaef9e31b243d5aaf89b71f66075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd3b6b7e9aadb1189cb2a277a2f68f6.png)
(2)当t为何值时,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459df8ded6fc55d4536d29c898396c95.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图1,在
中,
,
,
,
.以
为边,在
外作等边
,
是
的中点,连接
并延长交
于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/54d79024-6fec-4f61-8dd9-a4e65c31e008.png?resizew=269)
(1)求证:四边形
是平行四边形;
(2)如图2,将图1中的四边形
折叠,使点
与点
重合,折痕为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ec371d5dbc19d236bf8a1f084031e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6131160eaee962470abc7771df265c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03f416cb4d50a5f473df4bbceeb3094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/54d79024-6fec-4f61-8dd9-a4e65c31e008.png?resizew=269)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)如图2,将图1中的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
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解答题-证明题
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【推荐2】如图,矩形EFGH的顶点E,G分别在菱形ABCD的边AD,BC上,顶点F,H在菱形ABCD的对角线BD上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/ea621e26-6dc4-4e08-8cf3-addac9a6ec6a.png?resizew=194)
(1)求证
;
(2)若E为AD的中点,
.
①求菱形ABCD的边长;
②若
,求菱形ABCD的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/ea621e26-6dc4-4e08-8cf3-addac9a6ec6a.png?resizew=194)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b555a0bb6b5132ecfb9cae3769912c3.png)
(2)若E为AD的中点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05529d5906c6873231d138127bc9e2d9.png)
①求菱形ABCD的边长;
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
您最近一年使用:0次