如图,在
和
中,
,
,
,点
在
内,连接
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/02877754-9f71-4dc0-b969-9d1d2efcb75f.jpg?resizew=164)
(1)求证:
;
(2)若
,
,求
的长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34323137ddb894a70d97511aa5fe6f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d9bf69aadd34af9a68cfb3553d9286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c2240a883d4b245b410c365b135c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ccda137a92ff6954cb469bad3b239d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/02877754-9f71-4dc0-b969-9d1d2efcb75f.jpg?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f7e606ae1c264819d08cbfa0a77b89.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6813cfccfba3043fc567b0dadf76d229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
更新时间:2023-02-25 03:47:07
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】在
中,
,
,将
绕点
顺时针旋转一定角度
,得到
,点
的对应点分别是
.
(1)如图
,当点
恰好在
上时,求
的度数;
(2)如图
,点
是边
的中点,当
时,请证明
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/1/2e64cc54-6e10-4e05-8872-94c2bdfc9219.png?resizew=322)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/9d3e081637bcea5368cc72370bae283b.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccaca87af1d0512467f846b07ccf73a.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,点
在
上,
.
(1)若
,求
的度数;
(2)若
平分
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b109fa584776686ec71fd119309893.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/4/3df4edc6-9958-45a0-adc4-3def192e6993.png?resizew=251)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76ffd241623ec4ee9fd08876464def3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c226581e14091779321c9fe91160ceef.png)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图1,在Rt△ABC中∠ACB=90°,∠BAC=30°,AB=4cm.点P是以AC为直径的半圆上的动点,设C,P两点间的距离为xcm,B,P两点间的距离为y1cm,A,P两点间的距离为y2cm.根据学习函数的经验,小宇分别对函数y1,y2随自变量x的变化而变化的规律进行了探究.下面是小宇的探究过程,请补充完整:
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874531025600512/2932507477090304/STEM/97e89bf7-2361-4ca1-8958-67e7cba6f83c.png?resizew=373)
(1)根据点P在半圆上的不同位置,画出相应的图形,测量线段CP,BP,AP的长度,得到下表的几组对应值:
(2)如图2,在平面直角坐标系xOy中,画出了函数y1的图象,请在同一坐标系中,描点并画出函数y2的图象;(2)结合函数图象填空:当x≈ cm时,y1=y2;当y1<y2时,x的取值范围是 ;(结果精确到0.1cm)
(3)当PA=PC时,结合函数图象写出线段CP与BP的长.(结果精确到0.1cm)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874531025600512/2932507477090304/STEM/97e89bf7-2361-4ca1-8958-67e7cba6f83c.png?resizew=373)
(1)根据点P在半圆上的不同位置,画出相应的图形,测量线段CP,BP,AP的长度,得到下表的几组对应值:
x/cm | 0 | 1 | 2 | 3 | 3.5 |
y1/cm | 2 | 3 | 3.8 | 4.4 | 4 |
y2/cm | 3.5 | 3.3 | 2.8 | 1.7 | 0 |
(3)当PA=PC时,结合函数图象写出线段CP与BP的长.(结果精确到0.1cm)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,在锐角三角形ABC中,
,以BC为直径作
,分别交AB,AC于点D,E,点F是BD的中点,连接BE,CF交于点G.
![](https://img.xkw.com/dksih/QBM/2022/4/29/2975198701928448/2980530867912704/STEM/0d52e7c2-be81-479e-a2a4-fc4d7821fffb.png?resizew=191)
(1)求证:
.
(2)若
,
,求线段AD的长(用含r的代数式表示).
(3)若
,探索CG与FG的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2022/4/29/2975198701928448/2980530867912704/STEM/0d52e7c2-be81-479e-a2a4-fc4d7821fffb.png?resizew=191)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7649728e8210b186a7bddc85da7c8885.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4812b42eebc1c91e2dc00d7112550ad9.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8376cf9afd3c5686f4bd0debede45301.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,矩形ABCD中,AB=3,BC=2,点M在BC上,连接AM,作∠AMN=∠AMB,点N在直线AD上,MN交CD于点E
(1)求证:△AMN是等腰三角形;
(2)求BM•AN的最大值;
(3)当M为BC中点时,求ME的长.
(1)求证:△AMN是等腰三角形;
(2)求BM•AN的最大值;
(3)当M为BC中点时,求ME的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/6169068d-2251-4994-9358-54735dabfd8d.png?resizew=175)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图1,在△ABC中,AB=AC=10,tanB=
,点D为BC边上的动点(点D不与点B,C重合).以D为顶点作∠ADE=∠B,射线DE交AC边于点E,过点A作AF⊥AD交射线DE于点F,连接CF.
(1)求证:△ABD∽△DCE;
(2)当AB∥DE时(如图2),求AE的长.(提示:过点A作AH⊥BC交BC于点H)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
(1)求证:△ABD∽△DCE;
(2)当AB∥DE时(如图2),求AE的长.(提示:过点A作AH⊥BC交BC于点H)
![](https://img.xkw.com/dksih/QBM/2021/8/21/2790701928333312/2791185886404608/STEM/7f6652144c7a420f9c60e1649d84a0f5.png?resizew=388)
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