如图,AD为△ABC的中线,BE为△ABD的中线.
(1)在△BED中作BD边上的高,垂足为F;
(2)若△ABC的面积为40,BD=5,则△BDE中BD边上的高为多少?
(1)在△BED中作BD边上的高,垂足为F;
(2)若△ABC的面积为40,BD=5,则△BDE中BD边上的高为多少?
![](https://img.xkw.com/dksih/QBM/2018/8/17/2012473600819200/2012652755656705/STEM/18db0f90981846e693807f505bfbe516.png?resizew=153)
更新时间:2018-08-17 23:35:25
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,点D为形外一点,且
,
,M为
的中点,请仅用无刻度的直尺分别按下列要求画图.(保留画图痕迹 ,不需要证明)
的
边上的中线
;
(2)在图2中,先画出
边的中点E,再画出
的
边上的高
.
![](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/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12143a06ed24558d8cc7ad39961d3e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)在图2中,先画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图是由边长为 1 的小正方形组成的网格,每个小正方形的顶点叫做格点,△ABC 的顶点在格点上.利用全等的知识,仅用不带刻度的直尺,在网格中作出图,并保留作图痕迹.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/af495d6a-ea2a-4bd7-91a7-9a69ed56300a.png?resizew=313)
(1)点
的坐标是 ;
的面积是 ;
(2)作出
的高
;
(3)过点
作线段
,使其平分
的面积;
(4)在网格中找一格点
,使
与
全等,直接写出满足条件的所有
点有几个
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/af495d6a-ea2a-4bd7-91a7-9a69ed56300a.png?resizew=313)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b847fd9f7605d7cb94edcbc7627513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb85aa4871eb1dfb392613d429a9314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5e9dae9986ec5a12535e42e95ac43a.png)
(4)在网格中找一格点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0436efefa53aad714565ab2ba7ff90fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe3a78950f6a4bb479c7ec0d8e57b5b.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,
中,
,
,
,
,若动点
从点
开始,按
的路径运动,且速度为每秒
个单位,设运动的时间为
秒.
(1)当
秒时,
把
的面积分成相等的两部分;
(2)当
秒时,
把
分成的
和
的面积之比是 ;
(3)当
为多少秒时,
的面积为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f149e83812e72efd7dd3dfc78d0134ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348216467fda035329fe8fac46b39911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd90bfa2987b84df430498021d5f648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba5ca8ae34ecf31ebdea3c091d356b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/a94dda67-a466-4951-affa-4427ab271f0f.png?resizew=370)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15a13b4190ac3d5feaee27a4c97b21b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b837fd9c52f60bfb3b6852733abc790.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在
中,
,射线
,点
从点
出发沿射线
以
的速度运动,当点
出发
后,点
也从点
出发沿射线
以
的速度运动,分别连接
,
,
.设点
运动时间为
,其中
.
(1)若
,则
的取值范围是______;
(2)求
为何值时,
平分
的面积;
(3)求
为何值时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db58f1912fc3fb507438cdd6351e5f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666ac5c50dbe7c30bc8b60d7f7b1b371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e5acdedbab4bba6a4f5defc72c70b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecd76012d1b9c5e9fec6221e6e489c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/5/f9f5752c-5075-425a-a230-a54738e55895.png?resizew=143)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e682f4f1d2035b1c7e225a84059f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
您最近一年使用:0次