(1)如图1,在
中,
,
边上的垂直平分线
交
于点D,交
于点E,连接
,
将
分成两个角,且
,求
的度数.
(2)如图2,
中,
、
的三等分线交于点E、D,若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7f6d278f2ef7a193b7eed7be6b3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9d120f194183358b94b99c4376e402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756eb9a840789a7b4b265aa5b2d2958a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6aecc788824453d80546bf649c077fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
23-24八年级上·重庆渝北·期中 查看更多[5]
重庆市渝北区渝北区实验中学校2023-2024学年八年级上学期期中数学试题广东省湛江市霞山区银帆学校2023-2024学年八年级上学期期中数学试题广东省湛江市霞山区滨海学校2023-2024学年八年级上学期期中数学试题(已下线)专题01 三角形的证明(考点清单,知识导图+7个考点清单、题型解读)-2023-2024学年八年级数学下学期期中考点大串讲(北师大版)(已下线)猜想01 三角形(考题猜想,常考易错7个考点42题专练)-2023-2024学年八年级数学下学期期中考点大串讲(北师大版)
更新时间:2024-03-22 21:43:11
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在
中,
垂直平分
平分
.
(1)若
,求
的度数;
(2)若
,
与
的周长之差为
,且
的面积为
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8237e12e3e46a7383df36a56e2d3a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/c66ae0cd-cbc0-46f7-98e5-ed96c3e72117.png?resizew=168)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32403e6cdd6e8e12c426089b46ccecfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6850a299395c314b8f8f2f8ca50c9895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b1fe1b971b780e443a9b13621611c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f517953a21c2a45fd8465072c44bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9829733240df90d85e5349c3dc5985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
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【推荐2】【概念认识】如图①,在
中,若
,则射线BD,BE叫做
的“三分线”. 其中,射线BD是“邻AB三分线”,射线BE是“邻BC三分线”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/ce00119c-d2ab-4a44-a05c-7b62068408bb.png?resizew=504)
【问题解决】
(1)如图②,在
中,
,若
的三分线BD交AC于点D,则
;
(2)如图③,在
中,BP、CP分别是
邻AB三分线和
邻AC三分线,且
,求
的度数;
【拓展延伸】
(3)在
中,
是
的外角,
的三分线与
的三分线交于点P. 若
,直接写出
的度数. (用含 α、β 的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0e259ba97f664ba2e3f1d47337846f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/ce00119c-d2ab-4a44-a05c-7b62068408bb.png?resizew=504)
【问题解决】
(1)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f852c4b21dcfb966aa9c3f5ca3bfc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b5c0e0724cce5c25a88dca5e9220c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b88e9a4616bf02cc44fefd7eaf1e4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
【拓展延伸】
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f940d1fb3a7467a050e8f8e1cb0784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0433f8116768b42642a7f7e5977ce6.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在四边形
中,
,
为边
上一点,且
.
平分
;
(2)如图2,
为
上一动点(不与点
重合),
.求证:
;
(3)在(2)的条件下,若
,过点
作直线
,作
,交直线
于点
,用等式表示
与
的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95276a20fa0863684dc87080784acfc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e406c86508acd282d03bb3632eff5f5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febd3157ef749dff46bf01a04b46eb0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea23400f38c34260fc327633123a0d2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801e45b2c5478b7a5e1dc8ef6a911d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502b2e185cf1eede6730577e6924e486.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f68e4414c9ab464bf433385c03705f.png)
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名校
【推荐2】如图1,一块直尺和一块含30°的直角三角板如图放置,其中直尺和直角三角板的斜边平行,我们可以抽象出如图2的数学模型:
,
,
,
分别交
、
于点E、F、
的角平分线
交
于点D,H为线段
上一动点(不与A、B重合),连接
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7f074f56-78d2-415d-bd7a-bc49c217911a.png?resizew=417)
(1)当
时,求
.
(2)
在线段
上任意移动时,求
,
,
之间的关系.
(3)在(1)的条件下,将
绕着点
以每秒5°的速度逆时针旋转,旋转时间为
,则在旋转过程中,当
的其中一边与
的某一边平行时,直接写出此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6cc9f041724e7fa6b08c717de02fc9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda35971471b3c5dce41a879d0094e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01391b57f18b60a94042c43a99a3514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7f074f56-78d2-415d-bd7a-bc49c217911a.png?resizew=417)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec231526fd5b54f1c1a7fd9cbc9598c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a12e99f4c85dbb713b8c42061ff1c1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a12e99f4c85dbb713b8c42061ff1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d459f8347aed85478b1c30353ae623d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecec0ac9ee10034e651df1ef4c18dbc1.png)
(3)在(1)的条件下,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c23ff7285987442a13ce56dab34d8ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23345033fde08c438555c30fc0691e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c23ff7285987442a13ce56dab34d8ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐1】如图,在正方形
中,点E在边
上(不与点B,C重合),连接
.点D关于直线
的对称点为P,连接
,
,
.
交
于点F,延长
交
的延长线与点H.
(1)依题意补全图形,并判断
与
是否相等.
(2)求
的度数.
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/8/4dacd555-d385-47a5-997f-28bd2e9ab66d.png?resizew=179)
(1)依题意补全图形,并判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35adeb057595dd77b0e7cd8801183d4.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0762db973f1e7c30bf197aa793b93052.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
【推荐2】如图,点
,
在平面直角坐标系中的坐标轴上,点
为
内一点,
.
的距离;
(2)如图1,射线
交
的垂直平分线于点C,试判断
的形状,并说明理由;
(3)如图2,
为x轴正半轴上一点,将
沿
所在直线翻折,与y轴,线段
分别交于点F,G,试探究
的周长是否会发生变化,若变化,求变化范围;若不变,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586d6b7a54a256cb0ecd0ea2d8262f6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549f5e607ed8f8812cd9d40b693074fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c76045dbd863a89519d1993903516fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图1,射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a702eadcc351f3c4c47dfae3edebcfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.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/7bd9311e5295f10061deb2872fe04af5.png)
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