如图1,在
中,
于E,E恰为BC的中点
.
;
(2)如图2,点
在
上,作
于点
,连结
.求证:
;
(3)请你在图3中画图探究:当
为射线
上任意一点(
不与点
重合)时,作
于点
,连结
,线段
与
之间有怎样的数量关系?直接写出你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9cb71844e7d5cd59c893caba36f9720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb865bbbda1b903eda0129ff8821b2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311914a1eb78b37430a02510cf66b510.png)
(3)请你在图3中画图探究:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171484a68c84cad91e4f2233392f600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb865bbbda1b903eda0129ff8821b2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fdc54c615bb3bc313886c1e1e67a42f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
23-24九年级上·北京石景山·期中 查看更多[3]
北京市石景山区京源学校2023-2024学年九年级上学期期中数学试题(已下线)专题03 平行四边形的性质和判定之八大题型-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(人教版)(已下线)第六章第01讲 平行四边形的性质(9类热点题型讲练)-【帮课堂】2023-2024学年八年级数学下册同步学与练(北师大版)
更新时间:2023-11-07 16:08:35
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解答题-证明题
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【推荐1】如图,△ABC中,∠B=45°,∠ACB=30°,CD平分∠ACB,AD⊥CD,求证:CD=AB+AD
![](https://img.xkw.com/dksih/QBM/2021/9/26/2816285831929856/2816467424780288/STEM/5dc4acc3-1a9b-478d-ae8a-95e87e2d701c.png)
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【推荐2】如图,△ABC中,D是AC的中点,E是线段BC延长线上一点,过点A作BE的平行线与线段ED的延长线交于点F,连接AE,CF.求证:CF∥AE.
![](https://img.xkw.com/dksih/QBM/2018/12/11/2094090280542208/2095936309927936/STEM/3a3a84b38f6144848c9f7943f5d76f02.png?resizew=186)
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解答题-问答题
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适中
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【推荐1】如图1,在
中,
,
为
上一点,
沿直线
翻折,点
恰好落在直线
上
处.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/561f5889-85e3-4756-9332-2b93ea8edacd.png?resizew=396)
(1)如图2,当
时,过点
作
于点
,
①求
的度数;
②求证:
;
(2)当
时,若
,
,求
的周长(用含
,
的式子表示).
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/561f5889-85e3-4756-9332-2b93ea8edacd.png?resizew=396)
(1)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937442ad4cc480adc11bb143559454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5686730a081427d27fdc45997eca9c.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68e31c0164696680d71f98ad8834618.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c1208335250db19f9519a7a7a2d393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3d296e0d7154a170cb7d3ae42989b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a88b719166fcc1431f876bc8c5656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e64c953aaf341e772a5fe776fbc78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐2】点E是BC的中点,DE平分
.
![](https://img.xkw.com/dksih/QBM/2022/1/3/2893538915106816/2897074811756544/STEM/bd9df6f1-e1c9-4d9a-968b-83efea25fb5d.png?resizew=288)
(1)如图1,若
,求证:AE平分
;
(2)如图1,若
,
,求
的度数;
(3)如图2,若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/3/2893538915106816/2897074811756544/STEM/bd9df6f1-e1c9-4d9a-968b-83efea25fb5d.png?resizew=288)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d8397018b0a01a1b4e9574604f9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
(2)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d8397018b0a01a1b4e9574604f9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde471c87e388d3a589d8e3f39a9187f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a852c13de65877be1f43ac1f88f179d7.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032b3e422eeb39cf649dffc9934a7cf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c562adb241caeba188b983f534a489.png)
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【推荐1】如图,在
中,
,
分别平分
,
,交
于点
,
.
;
(2)过点
作
,垂足为
.若▱
的周长为
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935ad59079c158ea0f92018fc548e4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f10681704c4fccfd37664eaf34391dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa783be67f9c5bb06c08796ce22f82c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b9d7b4c41c5815fac4e1786f77c0596.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e60158453fd24b1af2f4f65a3d2e46d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1835e4f4b1b030477f65dabd16ce080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f34874a0fb82056619cb2c59c57514c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
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【推荐2】如图,一次函数y=
x+b与反比例函数y=
的图象交于点A(4,a)、B(﹣8,﹣2).
![](https://img.xkw.com/dksih/QBM/2020/8/1/2518188291211264/2524356524711936/STEM/7f45e812707f46d880216328c0735aff.png?resizew=409)
(1)求k、a、b的值;
(2)求关于x的不等式
x+b>
的解集;
(3)若点P在y轴上,点Q在反比例函数y=
的图象上,且A、B、P、Q恰好是一个平行四边形的四个顶点,试求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
![](https://img.xkw.com/dksih/QBM/2020/8/1/2518188291211264/2524356524711936/STEM/7f45e812707f46d880216328c0735aff.png?resizew=409)
(1)求k、a、b的值;
(2)求关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
(3)若点P在y轴上,点Q在反比例函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
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【推荐1】如图,平行四边形
中
,
,
,
,
,
的平分线交
的延长线于点F.
![](https://img.xkw.com/dksih/QBM/2023/2/10/3171580721422336/3188844594806784/STEM/26895bd5e7144c29a7d7c2c9d7dfeefb.png?resizew=153)
(1)求证:
;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b501edca59e08fad839ddfc4393e483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915553864f504e851e625b379ef92116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3702b5620dbee356a8e560c78d223ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://img.xkw.com/dksih/QBM/2023/2/10/3171580721422336/3188844594806784/STEM/26895bd5e7144c29a7d7c2c9d7dfeefb.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c056a26c993ab806c603f063f78da923.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1e63ea03dfdc78e824b7c1c055c24a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9940b7a52cfb34f91389c8adac6b69e.png)
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【推荐2】在
中.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/a765671f-fc5a-4d7d-be36-af4619627f8d.png?resizew=218)
(1)尺规作图:作
的平分线
,E为
与
的交点(保留痕迹,不写作法);
(2)在(1)的条件下,若
,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/a765671f-fc5a-4d7d-be36-af4619627f8d.png?resizew=218)
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee74b2491993ced6f30773dd39ede785.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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