如图,在
中,
,点
为
的中点,
为
上一点.
(1)若
,点
为
上一点.
①如图1,
,则
的值为_______(直接写出结果);
②如图2,若点
在
的延长线上,
在
的延长线上.试判断
之间满足的数量关系并说明理由;
(2)如图3,若
于点
的延长线交于点
.若
,请直接写出
的值为______.
![](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/8455657dde27aabe6adb7b188e031c11.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/60ef95894ceebaf236170e8832dcf7e3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ed5efd4c3fd2e740b19318308b05e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/970496276d831126182e9403a4f547eb.png)
②如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088a682b144a6fa96fdb60dd5a9c992c.png)
(2)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e1bf1de0a5d4ff38cb00d81f39c3a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d73541c75c87b2e3c2b179292bb4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f276ad76c075f4be32ad326d223cf3.png)
![](https://img.xkw.com/dksih/QBM/2021/2/2/2649468616728576/2662201395109888/STEM/fdcbcb44-a12d-4ded-91d0-ba3a8a5c7df3.png)
20-21八年级上·湖北武汉·期末 查看更多[3]
湖北省武汉市黄陂区2020-2021学年八年级上学期期末数学试题2023年广东省深圳市福田区中考模拟数学试题(已下线)专题4.53 相似三角形的性质与判定综合专题(分层练习)(综合练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(北师大版)
更新时间:2021-02-20 16:45:30
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】【问题原型】如图①,四边形ABDE、AGFC都是正方形,
,连结CE、BG.求证:
.
【发现结论】如图②,设图①中的直线CE与直线BG交于点H.求证:
.
【结论应用】将图①中的正方形AGFC绕着点A顺时针旋转角度
,在整个旋转过程中,当点E、C、G三点在同一条直线上时,若
,
,借助图①,直接写出BG的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb980da8e86b4cfd322616dc84fc6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb29dc024f8f554eaa879bac345aeb92.png)
【发现结论】如图②,设图①中的直线CE与直线BG交于点H.求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4514b6d7e2c6fb9e8a0d83768db7ffe8.png)
【结论应用】将图①中的正方形AGFC绕着点A顺时针旋转角度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813472fe85905302843cb3aadec9c8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740679040139264/2740953026535424/STEM/07bb1531-e449-41b4-93c0-6370413a9885.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】在
中,
,点D在射线
上(不与点
重合),连接
,将
绕点D顺时针旋转90°得到
,连接
.
![](https://img.xkw.com/dksih/QBM/2020/12/16/2622337070555136/2630924065013760/STEM/bffbe16a-02ab-45db-bb44-d0f481e5a64d.png?resizew=463)
(1)如图1,点D在
边上.
①求证:
;
②若
,求
的长.
(2)如图2,点D在
边的延长线上,用等式表示线段
之间的数量关系(直接写出结论).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2bcb64c11c2d58a2306194400f96ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2020/12/16/2622337070555136/2630924065013760/STEM/bffbe16a-02ab-45db-bb44-d0f481e5a64d.png?resizew=463)
(1)如图1,点D在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa6122151943691e004935f18af2f70.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530d75ef9cfb19d7899991b5e14698d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图2,点D在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52029d3815b6fb19fce8f09490e5c131.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】已知:
,在
中,
,
,点
在
上,边
在
上,在
中,
,边
在直线
上,
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/2ca00ea3-a0d0-490e-9821-3dcc9c672f4d.png?resizew=565)
(1)如图1,求
的度数;
(2)如图2,将
沿射线
的方向平移,当点
在
上时,求
度数;
(3)如图3,将
沿射线
的方向平移到
的位置,若点
是
的中点,
,则平移的距离为______
.
(4)将
在直线
上平移,当以
、
、
为顶点的三角形是直角三角形时,请直接写出
度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecce2786526e1d44971237a1bf4ecd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5d835ca247252e4903af22789b5f45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c72cf648e9ef00cd1a7fdb97dd381c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345c91c9e67e6ee00a872078ab17f094.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/2ca00ea3-a0d0-490e-9821-3dcc9c672f4d.png?resizew=565)
(1)如图1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c35b4fb9ef7d9345043bc3d34af11e.png)
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5d835ca247252e4903af22789b5f45.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/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a2e6494cf8d2dff0746a9bb72cef43.png)
(3)如图3,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5d835ca247252e4903af22789b5f45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9a3b1b310f34d92f744e03b628dd6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da927456aa006b1390bbc13cc72667a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
(4)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5d835ca247252e4903af22789b5f45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d475cdab0f6b8acdd89a7b2159d96800.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
是
的直径,
是弦,
,延长
到D,使
.
(1)求证:
是
的切线;
(2)若
,求
的长.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc849980579cd8b0560d76ba78331ffa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/33d02f01-5cc9-4478-8a56-4bc55ed151cc.png?resizew=143)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.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,
,
是
的中点,点
,点
分别在
,
上,连结
,
.
,求证:
.
(2)如图2,在(1)的条件下,连结
,若
,求
的值.
![](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/8455657dde27aabe6adb7b188e031c11.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/a0ed1ec316bc54c37c4286c208f55667.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/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46973e925274b74bf0319f5e3561b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca3d13b9ef559171915f01030c69cb38.png)
(2)如图2,在(1)的条件下,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d2cef8dfdc7702cc424ebd9c656223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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】【问题情境】如图,在
中,
,
,
与直线
垂直,垂足为D,
的平分线
交
于点E,点H在线段
上,
的延长线与
的延长线相交于点F.
【探索求证】(1)求证:
;
【深入探究】(2)若
,请判断
与
有怎样的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf82e97595128f030504932bd738e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a16f5621716bfef7a056a3f2712feb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
【探索求证】(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbeb8bdc95779c4ea641e1100361790.png)
【深入探究】(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d5899fa8e746f48f470f1b16bb82e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/764f61a1-e177-483d-971b-3c403d2fa298.png?resizew=209)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,四边形ABCD是菱形,过AB的中点E作AC的垂线EF,交AD于点M,交CD的延长线于点F.
![](https://img.xkw.com/dksih/QBM/2019/8/27/2277805575512064/2277853366525952/STEM/da14746bdcbb428382942c8799c70be5.png?resizew=193)
(1)证明:
;
(2)若
,求当形ABCD的周长;
(3)在没有辅助线的前提下,图中共有_________对相似三角形.
![](https://img.xkw.com/dksih/QBM/2019/8/27/2277805575512064/2277853366525952/STEM/da14746bdcbb428382942c8799c70be5.png?resizew=193)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c33f05acd392b64410ec012ac18b5ab.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ade06068471a9d76e32b417bef7551.png)
(3)在没有辅助线的前提下,图中共有_________对相似三角形.
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解答题-证明题
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适中
(0.65)
名校
【推荐2】如图1,Rt△ABC中,∠ACB=90°,点D、点E分别在边AC、BC上,且DE∥AB. 现将△CDE绕点C逆时针旋转某一角度,点D恰落在边AB上,连接BE.
![](https://img.xkw.com/dksih/QBM/2020/10/9/2567321038938112/2567763640303616/STEM/4a78b92c1287490eb6789e58e3bbd522.png?resizew=589)
(1)当AC=BC时,如图2,
①线段AD与BE的数量关系是 ;
②线段AD、BD、DE的数量关系是 .
(2)当AC=nBC时(n>0),如图3,
①判断线段AD与BE的数量关系,并予以证明;
②直接写出线段AD、BD、DE的数量关系 .
![](https://img.xkw.com/dksih/QBM/2020/10/9/2567321038938112/2567763640303616/STEM/4a78b92c1287490eb6789e58e3bbd522.png?resizew=589)
(1)当AC=BC时,如图2,
①线段AD与BE的数量关系是 ;
②线段AD、BD、DE的数量关系是 .
(2)当AC=nBC时(n>0),如图3,
①判断线段AD与BE的数量关系,并予以证明;
②直接写出线段AD、BD、DE的数量关系 .
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