如图,在△ABC中,∠C=45°,∠B=60°,BC为
+1,点P为边AB上一动点,过点P作PD⊥BC于点D,PE⊥AC于点E,则DE的最小值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/27/62b05af5-960f-4166-ab58-1324b87914ab.png?resizew=184)
19-20九年级下·江苏泰州·阶段练习 查看更多[4]
江苏省泰兴市实验初级中学教育集团(联盟)2019-2020学年九年级下学期3月阶段性数学试题江苏省泰州市泰兴实验中学2019-2020学年九年级下学期3月月考数学试题2020年吉林省长春市中考数学考前适应性练习试题(已下线)专题3.21 圆内接正多边形(专项练习)-2021-2022学年九年级数学下册基础知识专项讲练(北师大版)
更新时间:2020-04-01 16:48:40
|
相似题推荐
填空题
|
较难
(0.4)
名校
【推荐1】如图,等腰直角△ABC中,∠ACB=90°,AC=BC=4,M为AB中点,D是射线BC上一动点,连接AD,将线段AD绕点A逆时针旋转90°得到线段AE,连接ED、ME,则点D在运动过程中ME的最小值为_____ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/f974f311-0128-40cd-aff4-72cbfdaaf50f.png?resizew=188)
您最近一年使用:0次
填空题
|
较难
(0.4)
【推荐2】如图,
中,
,
,点
在边
上,将
沿
翻折,点
的对称点A′,使得A′D∥BC,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60ba3394e65e940f7d3e2d9c7c8fa97.png)
______ .
![](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/0f3018c687427b6257767eda4a8c6612.png)
![](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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60ba3394e65e940f7d3e2d9c7c8fa97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/8fefed92-d6fc-400e-8b88-d206d32f38a4.png?resizew=145)
您最近一年使用:0次
填空题
|
较难
(0.4)
【推荐1】在平面直角坐标系中,已知点A(0,-2)、B(0,3),点C是x轴正半轴上的一点,当∠BCA=45°时,点C的坐标为__________________ ;
您最近一年使用:0次
填空题
|
较难
(0.4)
名校
【推荐2】
中,
,
,点
为
上的一点,且
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d768ffd5bf75080e8ff5ce6b472c0cc0.png)
![](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/12143a06ed24558d8cc7ad39961d3e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/24/416e994b-7db8-48a4-8bda-d9ce62247ce7.png?resizew=135)
您最近一年使用:0次
填空题
|
较难
(0.4)
真题
【推荐1】如图,在矩形
中,
,
,
,
分别为
,
边的中点.动点
从点
出发沿
向点
运动,同时,动点
从点
出发沿
向点
运动,连接
,过点
作
于点
,连接
.若点
的速度是点
的速度的2倍,在点
从点
运动至点
的过程中,线段
长度的最大值为_________ ,线段
长度的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.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/9d78abbad68bbbf12af10cd40ef4c353.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/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4335b8477311e7c294504221bc107e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
您最近一年使用:0次
填空题
|
较难
(0.4)
【推荐2】在等边三角形ABC中,D,E分别是AC,BC上的点,AE与BD相交于点P.若△BCD的面积是12
,BE=6,∠APB=120°,则△ABP的外接圆的半径长为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2020/10/15/2571302006513664/2573715848716288/STEM/70dab760a8ac40d98da8bc31254ac239.png?resizew=159)
您最近一年使用:0次
填空题
|
较难
(0.4)
名校
【推荐1】如图,在
中,
,点P为
边上一点,过A、B、P作
,当点P从点B运动到点C时,点O运动路径的长为______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42a355c1b5e9eb0934ccbdac25950e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/13/aff2d8f0-f119-4714-82e1-75a50db18a77.png?resizew=133)
您最近一年使用:0次
填空题
|
较难
(0.4)
解题方法
【推荐2】已知如图1,圆柱体铅笔插入卷笔刀充分卷削,得到底面直径BC为2的圆锥,∠BAC=30°.底面边长为1的正六棱柱铅笔插入卷削,得到如图2所示铅笔和锯齿状木屑(木屑厚度忽略不计),木屑锯齿齿锋点G相邻凹陷最低点为H,则AG=________ ,GH=________ .
![](https://img.xkw.com/dksih/QBM/2020/7/1/2496306384707584/2497201930403840/STEM/fd33cc255bdf4218a7d328d277002c76.png?resizew=542)
您最近一年使用:0次