如图,在
中,
,点D是线段
的中点.
(1)求作矩形
(尺规作图,不要求写作法,保留作图痕迹);
(2)连接
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/bafe101a-42bc-4323-a133-f259bf1e1201.png?resizew=113)
(1)求作矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a5a2949b3d520ed03d57126c7d4d8d.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
更新时间:2023-08-15 10:50:46
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】已知:如图,在
中,
,
的平分线交
于点E,交
于点F,
,垂足为点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/9bb2f43e-1925-49c9-a48e-9c63847bb562.png?resizew=258)
(1)求证:
;
(2)过点E作
交
于点G,过点F作
,垂足为点H.
①请判断
与
的数量关系,并说明理由;
②当
时,设
,试用含有x的式子表示
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/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/9bb2f43e-1925-49c9-a48e-9c63847bb562.png?resizew=258)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
(2)过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7eb5fb41884fc7b27f2f2c6ef1ea4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7044476eb6e90a781518c230f4637bc1.png)
①请判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96bc55510792f8bd30e1c0686609fe3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5f736b1195fef1d2d300168a795f1.png)
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名校
【推荐2】如图,AC和BD相交于点O,且AB//DC,OC=OD,求证:OA=OB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/7a83e3dd-b202-4a74-be18-f864c0166d09.png?resizew=244)
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解答题-问答题
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【推荐1】如图,在平面直角坐标系中,已知
,
,
,
,且以
,
,
,
为顶点的四边形为菱形.
点的坐标______;
(2)请用无刻度直尺作直线
,使直线
经过点
且平分菱形的面积,保留作图痕迹;
(3)已知点
是
边上一点,若线段
将菱形
的面积分为2:3两部分,直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaf13627819890607661d8eb55efa83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33accbbbde2d8e87780401f5b9c88c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d03310fa9440053c57d878acc06d02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37265a2c5a6db6e7571f16286aaed83e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)请用无刻度直尺作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a29d6cc4a77d6fe6cf68df31552a9df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
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【推荐2】如图,△ABC中,AB=AC,∠B的平分线交AC于D,AE∥BC交BD的延长线于点E,AF⊥AB交BE于点F.
(1)请说明△ABE的形状.
(2)若∠BAC=40°,求∠AFE的度数;
(3)若AD=DC=2,求AF的长.
(1)请说明△ABE的形状.
(2)若∠BAC=40°,求∠AFE的度数;
(3)若AD=DC=2,求AF的长.
![](https://img.xkw.com/dksih/QBM/2020/11/13/2592098264539136/2596768163561472/STEM/0fc35952ad964aaa95e6bbcd04835769.png?resizew=179)
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解答题-证明题
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【推荐1】(1)如图,在矩形
中,
.求:①矩形
的面积
;②对角线
的长.
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458336105414656/2458402445811712/STEM/9bc9da2b599842e0978e3e9921be95ef.png?resizew=158)
(2)如图,在菱形
中,
,
,
,
为垂足.
①求证:
.
②若
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47700255460768f6c205550ea4d5a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458336105414656/2458402445811712/STEM/9bc9da2b599842e0978e3e9921be95ef.png?resizew=158)
(2)如图,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fbee06d305abf6692125513dc3757f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3ba142708733e6bf5f65de71b9fbc59.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40cf2b11ab4c3588af9c64222bb8bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458336105414656/2458402445811712/STEM/8d0bd0b202924ba194138a7a2002e823.png?resizew=221)
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解答题-证明题
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【推荐2】如图,在矩形
中,对角线
,
相交于点
,
,
,
,
分别是
,
,
,
上的点,且
.
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750819903512576/2751853411426304/STEM/380ee650-e0d2-46e6-8e7c-3e50f7683d6e.png)
(1)求证:四边形
是矩形;
(2)若
,
,
,
分别是
,
,
,
的中点,且
,
,求矩形
的面积.
![](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/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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8100fc3751d7c5b484e68dcaedff4df.png)
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750819903512576/2751853411426304/STEM/380ee650-e0d2-46e6-8e7c-3e50f7683d6e.png)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c89029e1d782dbf6a0bda8605a7c5ad4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d222d3bcc808dd5b62b2a9ccb543a6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fc28f622892dd18bbbac95d541acfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐1】如图,在△ABC中,D是BC边上的一点,E是AD的中点,过A点作BC的平行线交CE的延长线于F,且AF=BD,连接BF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/462b9c53-a218-491f-a5a8-c76f12f767da.png?resizew=168)
(1)求证:BD=DC.
(2)若AB=AC时,试证明四边形AFBD是矩形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/462b9c53-a218-491f-a5a8-c76f12f767da.png?resizew=168)
(1)求证:BD=DC.
(2)若AB=AC时,试证明四边形AFBD是矩形.
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【推荐2】如图,将平行四边形ABCD的边DC延长至点E,使CE=DC,连接AE,交BC于点F.
(1)求证:△ABF≌△ECF;
(2)连接AC、BE,则当∠AFC与∠D满足什么条件时,四边形ABEC是矩形?请说明理由.
(1)求证:△ABF≌△ECF;
(2)连接AC、BE,则当∠AFC与∠D满足什么条件时,四边形ABEC是矩形?请说明理由.
![](https://img.xkw.com/dksih/QBM/2014/9/17/1573749876252672/1573749881749504/STEM/f4b0cc744c304a58b0d7ecdc146c8806.png?resizew=189)
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解答题-问答题
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【推荐3】在8×8的正方形网格中建立如图所示的平面直角坐标系,已知A(2,4),B(4,2).C是第一象限内的一个格点,由点C与线段AB组成一个以AB为底,且腰长为无理数的等腰三角形.
![](https://img.xkw.com/dksih/QBM/2012/6/8/1573402616176640/1573402667040768/STEM/e7e95a6c938a40958ffd8988597614be.png?resizew=203)
(1)填空:C点的坐标是 ,△ABC的面积是
(2)将△ABC绕点C旋转180°得到△A1B1C1,连接AB1、BA1,试判断四边形AB1A1B是何种特殊四边形,请说明理由;
(3)请探究:在x轴上是否存在这样的点P,使四边形ABOP的面积等于△ABC面积的2倍?若存在,请直接写出点P的坐标(不必写出解答过程);若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2012/6/8/1573402616176640/1573402667040768/STEM/e7e95a6c938a40958ffd8988597614be.png?resizew=203)
(1)填空:C点的坐标是 ,△ABC的面积是
(2)将△ABC绕点C旋转180°得到△A1B1C1,连接AB1、BA1,试判断四边形AB1A1B是何种特殊四边形,请说明理由;
(3)请探究:在x轴上是否存在这样的点P,使四边形ABOP的面积等于△ABC面积的2倍?若存在,请直接写出点P的坐标(不必写出解答过程);若不存在,请说明理由.
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