如图,四边形
是平行四边形,
,
,点
是
的中点,点
是
延长线上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/95b581eb-8cea-4ee6-b212-aec2bfe5d2d6.png?resizew=150)
(1)连接
,求证:
.
(2)若
.求证:
.
(3)在(2)的条件下,若
的延长线与
交于点
,试判断四边形
是否为平行四边形
并证明你的结论(请补全图形,再解答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35333abd7f02d663d15251bc5cbbf921.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/95b581eb-8cea-4ee6-b212-aec2bfe5d2d6.png?resizew=150)
(1)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de2c0c8cf35a26a344e9bd19350ee77d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e1e2732f6ae805698f94cc65f14d98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a3f5d73bae2ab3a31c353d38382d25.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d4c92b24cb675c2aa0d0f80abc59e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
更新时间:2023-05-06 17:20:46
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】已知:如图,点
在
的边
上,且
.
![](https://img.xkw.com/dksih/QBM/2020/1/27/2386260393795584/2387000094801920/STEM/17611abeb95a434788803d1e08aa2b09.png?resizew=238)
(1)求证:
;
(2)若
的平分线
交
于点
,
交
于点
,设
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73ee1f26de76e9d1ea54f54798d3a90e.png)
![](https://img.xkw.com/dksih/QBM/2020/1/27/2386260393795584/2387000094801920/STEM/17611abeb95a434788803d1e08aa2b09.png?resizew=238)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b760f1acdad0894e6a9c9a77ac89.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060705794ef87cc71dac40c57f27b1d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
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适中
(0.65)
【推荐2】已知:如图,在△ABC中,∠BAC=90°,BD平分∠ABC,DE⊥BC于E.
证明:BD垂直平分AE.
证明:BD垂直平分AE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/067c6e6a-ebf5-426f-b133-42f25bb0da69.png?resizew=172)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
名校
【推荐1】已知:如图,
的对角线
相交于点O,E是
的中点,F为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/12222280-d8bd-479b-b19d-28d0c88afbf6.png?resizew=207)
(1)求证:
,
;
(2)若
,
,则
的长是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989c75a3fd02e4971cab421c88de92f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/12222280-d8bd-479b-b19d-28d0c88afbf6.png?resizew=207)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03687d97d61b4a7cecbb73f2a6604212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daee8baa62b5b8d5db41eab0d360ee51.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c6c818df102a83ce5159e3208d01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解答题-问答题
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适中
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名校
【推荐2】
中,
,E,F分别是
的中点,延长
到点D,使
,连接
.
(1)试说明
与
互相平分;
(2)若
,求
的长.
![](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/8cca04b2a2b61d62a809776670a60c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f74a61581d965458316280968241e4c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304f8bf77804717112155e4c176e1ce6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/ba6447d7-f762-4812-afd5-f27abe1af936.png?resizew=178)
(1)试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐1】如图,△ABC的中线AD与中位线MN相交于点O.AD与MN有怎样的关系?证明你的结论.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/f9cc1bb9-3b84-40d7-84f6-ab8ff205ad46.png?resizew=231)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/f9cc1bb9-3b84-40d7-84f6-ab8ff205ad46.png?resizew=231)
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解答题-证明题
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【推荐2】探索证明如图,四边形ABCD中,对角线相交于点O,E、F、G、H分别是AD,BD, BC,AC的中点.
![](https://img.xkw.com/dksih/QBM/2015/11/18/1573929291390976/1573929297534976/STEM/5930014b17734efda17bfba84c6fff93.png)
(1)求证:四边形EFGH是平行四边形;
(2)当四边形ABCD满足一个什么条件时,四边形EFGH是菱形?并证明你的结论.
(3)当AB和CD满足什么条件时,四边形EFGH是正方形.(直接写出结论,不必写证明过程)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1573929291390976/1573929297534976/STEM/5930014b17734efda17bfba84c6fff93.png)
(1)求证:四边形EFGH是平行四边形;
(2)当四边形ABCD满足一个什么条件时,四边形EFGH是菱形?并证明你的结论.
(3)当AB和CD满足什么条件时,四边形EFGH是正方形.(直接写出结论,不必写证明过程)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在四边形
中,
,对角线
交于点O,
平分
,过点C作
交AB延长线于点E,连接
.
(1)试判断四边形
的形状,并说明理由;
(2)若
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b949c6455038208c75249687db04b00a.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/0d498ff2-4701-4edd-aeb7-b7178bf91a22.png?resizew=116)
(1)试判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed2eb31e0bbd816ca62a59aaca059a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】已知,如图,在
中,
, D是
的中点, 连接
,F是
的中点,过点C作
交
的延长线于点E,连接
.求证:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a5857d3f49d365e7c3b46eae3baf4c.png)
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