如图,在
中,直径
于点
,连接
并延长交
于点
,且
.
![](https://img.xkw.com/dksih/QBM/2018/12/21/2101536690061312/2102399664521216/STEM/79e87fca23154a409534708586d47d7f.png?resizew=90)
(1)求证:
;
(2)求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3672f17be1276e58ef19d9b368c96a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c97d73a687d728eb0b265d389c5d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc0613441dac089635db3d6efd4aeb4.png)
![](https://img.xkw.com/dksih/QBM/2018/12/21/2101536690061312/2102399664521216/STEM/79e87fca23154a409534708586d47d7f.png?resizew=90)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de32b9f279d0cbf3bc8ab9ada1f56111.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ea5b9a9873e62ae6da6f5d22e7c2eb.png)
更新时间:2018-12-22 18:45:58
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
为
外一点,
为
的垂直平分线,分别过点
作
,
,垂足分别为点
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/8794017a-4fd1-4281-a726-9c32f704f777.png?resizew=228)
(1)求证:
为
的角平分线;
(2)探究
,
,
之间的数量关系并给出证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.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/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/8794017a-4fd1-4281-a726-9c32f704f777.png?resizew=228)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
(2)探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图①,已知
,
平分
.将直角三角板如图放置,使直角顶点
在
上,
角的顶点
在
上,斜边与
交于点
(
与
不重合),连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/3252c38d-4d0a-489e-b61e-355adcc24ad1.png?resizew=576)
(1)如图②,若
,求证:
为等边三角形.
(2)如图③,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/3252c38d-4d0a-489e-b61e-355adcc24ad1.png?resizew=576)
(1)如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8a4b91763add3ee3a9f0dc1937398d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(2)如图③,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab1176f3c8a901c6b85d17636ee41d7.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】(1)如图1,
和
都是等边三角形,求证:
;
(2)如图2,已知点F在直线
上,
,以
为边作等边三角形
,连接
,求证:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80651f797ab9dccfd7163c605b091ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1371c96162b62b4735829affef0420.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/a1532913-11b7-4e14-a0a6-ebff0f184a78.png?resizew=161)
(2)如图2,已知点F在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90985dd5f7414d0ec43b0242041a98a3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/b7cafe5b-a259-444c-84e5-733eeaf52e19.png?resizew=183)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】在等边
中,F是边
所在直线上一点,点D在直线
上,
,以
为边作等边
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/8be0a3de-61e6-4bc5-aa5e-1a20ff9a9c79.png?resizew=357)
(1)当点F在线段
上时,如图①,求证:
;
(2)当点F在线段
延长线上时,如图②;当点F在线段
延长线上时,如图③,请直接写出线段
,
,
的数量关系,不需要证明;
(3)在(1)、(2)的条件下,若
,
,则
___________.
![](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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb5db813bc32243797bd2b54336a943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/8be0a3de-61e6-4bc5-aa5e-1a20ff9a9c79.png?resizew=357)
(1)当点F在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3043707938d31ac310733793c782515e.png)
(2)当点F在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(3)在(1)、(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fc232acd89fc499de346969ce8ced1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4267c178771ea6ddccecd9f9128d3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f76e37d6e6b182896ccaaa187cfe07.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,隧道的截面由
和矩形
构成,矩形的长
为
,宽
为
,隧道的顶端
(
的中点)高出道路
.
![](https://img.xkw.com/dksih/QBM/2020/5/15/2463170092392448/2463249043324928/STEM/86b61739bc0948ac81a5278a8da2f9c5.png?resizew=347)
(1)求
所在圆的半径;
(2)如果该隧道内设双行道,现有一辆超高货运卡车高
,宽
,问这辆货运卡车能否通过该隧道?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e514a244e6368d32e26ecc3ff58f51b.png)
![](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/4747af4bd482982633893f86deedf670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade9841a8e6840efddcfd8620a6fc1fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e514a244e6368d32e26ecc3ff58f51b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af93a15c5f6a2b9b54ae4e3bde633488.png)
![](https://img.xkw.com/dksih/QBM/2020/5/15/2463170092392448/2463249043324928/STEM/86b61739bc0948ac81a5278a8da2f9c5.png?resizew=347)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e514a244e6368d32e26ecc3ff58f51b.png)
(2)如果该隧道内设双行道,现有一辆超高货运卡车高
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f77f43b3edea630c0e81e45aa0821c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d017417b2d4097b1db19a6c51704fa.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,圆O的直径
,
,点P是射线
上的一个动点
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/1b08bbc5-5788-48d8-a953-eefc19955d9b.png?resizew=281)
(1)如图1,求
的长;
(2)如图1,若
,连接
,求证:
为圆O的切线;
(3)如图2,连接
、点P在运动过程中,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83cb6327dcbc8a998e6586bcfa7a3b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddd8dba1965a735c24203e15f493b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/1b08bbc5-5788-48d8-a953-eefc19955d9b.png?resizew=281)
(1)如图1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbda29fd703fd13e1bf4860d31cc5dbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50bed8d6701c91027d598d92046962cc.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
中,
,以OA为半径的
交BO于点C,交BO延长线于点
在
上取一点E,且
,延长DE与BA交于点F.
![](https://img.xkw.com/dksih/QBM/2019/4/13/2181664185696256/2183209725173760/STEM/564915994843473e9f8a39934b7b1d8a.png?resizew=149)
求证:
是直角三角形;
连接AC,
,
,求AF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7eb3a2c1708af75e441e9a84d051a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2199e62c1ae82544ef9c1e1189e123d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e7170bb4a2ddcef39391a06c989162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d5516c316f7a16de9ea235def2d1b5.png)
![](https://img.xkw.com/dksih/QBM/2019/4/13/2181664185696256/2183209725173760/STEM/564915994843473e9f8a39934b7b1d8a.png?resizew=149)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e64c953aaf341e772a5fe776fbc78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/519d3cbe962154438e43a23b0d9eda2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e690cd5c75c36fce3e75d96c7c47c1e.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
内接于
,过点C作射线
,使得
,
与
的延长线交于点P,D是
的中点,
与
交于点E.
与
的位置关系,并证明你的结论;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dffe8fdd11c77cca2aaa4abb8502f842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2719ab4ea9c7632f107a1f316563853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ced140fbe8f2af032f946666829df16.png)
您最近一年使用:0次