如图,
中,
,
,点D是
上一个动点(不与B、C重合),在
上取E点,使![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be3b58a4087b4a569572d93feceaec1b.png)
(1)求证:
;
(2)若
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2e679d7b314ff58c284da08e8edbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be3b58a4087b4a569572d93feceaec1b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/6/d7cc93ae-be38-41f2-8747-94bed8f56fbb.jpg?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbfb7665a54463b68487b6c53cdd97b3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
更新时间:2023-09-30 14:47:04
|
相似题推荐
解答题-证明题
|
较易
(0.85)
【推荐1】点
、
都在线段
上,且
,
,
,
与
相交于点
.
![](https://img.xkw.com/dksih/QBM/2022/1/27/2903705498902528/2904158222761984/STEM/cfaaf3137c0e407bbbd8398a3dfe50f3.png?resizew=186)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b4908b37cf23de34d38ae7a0bff278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2022/1/27/2903705498902528/2904158222761984/STEM/cfaaf3137c0e407bbbd8398a3dfe50f3.png?resizew=186)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d738e4127b5161affefbaa4f743201e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/052d471177df219bfec13448f539f19c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38eaea4a561ff9ed858ba7c5b07dba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
您最近一年使用:0次
解答题-证明题
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(0.85)
【推荐2】如图,
中,
,点D在
边上,
延长线于E,且
.
(1)求证:
;
(2)求证:
.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f1853f7e20d795df45a7c139c7af8f6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/41066670-58ab-4230-9e7d-8f74bdfd0bb1.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a8f5a76b9bf95f742a17ea0578151a.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐1】如图,
是
的直径,点
在射线
上,
与
相切于点
,过点
作
,交
的延长线于点
,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/dfeaf4c3-eeb8-49d2-becf-533e10edac32.png?resizew=164)
(1)求证:
是
的平分线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c38bbe49284a2ceab26001ced8cfd56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/dfeaf4c3-eeb8-49d2-becf-533e10edac32.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead1eda1ca5b67586379a09a4c3540b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef9a26f10ec80be707dd4c282be9c8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】如图,已知
,
,
,垂足分别为点B,A,
,
.若点E是
的中点,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/2021/3/19/2681293069164544/2681794039832576/STEM/b1e4eff9fcb14f3e8e4205b7a0394e9c.png?resizew=153)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐1】已知,如图,在平行四边形ABCD中,M是BC边的中点,E是边BA延长线上的一点,连接EM,分别交线段AD于点F、AC于点G.
![](https://img.xkw.com/dksih/QBM/2020/2/17/2400931957645312/2401094462234624/STEM/f01a875a8fbf4288bf9fab9570289f74.png?resizew=154)
(1)证明:
∽![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee94afa7f4cf73158b69725b0d7a6f0.png)
(2)求证:
;
![](https://img.xkw.com/dksih/QBM/2020/2/17/2400931957645312/2401094462234624/STEM/f01a875a8fbf4288bf9fab9570289f74.png?resizew=154)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5225e75e359a1aaac75c19bba1c338d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee94afa7f4cf73158b69725b0d7a6f0.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46f83f87d7977c809484d8963b498c2.png)
您最近一年使用:0次
解答题-问答题
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【推荐2】毕业季临近,我校为学生搭建了“理想之门”,希望同学们跨越理想之门,走向成功之路.“理想之门”最高处直立于点
之上,周围有圆柱体底座,不能直接测量到
点,小明想利用所学的数学知识测量
的高度.阳光下,他在点
处放一镜子(处于“理想之门”的影子中),并作一标记,来回走动,走到点
时,看到“理想之门”顶点
在镜面中的像与镜面上的标记重合,这时,测得小明眼睛与地面的高度
米,
米.然后,小明从点
沿
方向走了1米,到达“理想之门”影子的末端
处,此时,测得小明身高
米,影长
米,求“理想之门”的高
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2023/1/11/3150400303636480/3151149546602496/STEM/8654034646b24abfb68ad77c433ec329.png?resizew=257)
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