如图,在
和
中,
,点C在
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/c2e84628-02ed-4229-b429-a332a33e70e4.png?resizew=132)
(1)求证:
.
(2)若
,则
______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc12e15044327bb7a478e91a072d7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/c2e84628-02ed-4229-b429-a332a33e70e4.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1d4b1361aa8436571ef0a40d15ceea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5bf6f5d505e85102b0602c6a832907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bcfb91bf2911f80be6a2dcf42ae3aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
更新时间:2024-01-18 10:56:26
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在
中,
于点D,
于点E,
与
交于点F,且
.
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/27/c2ebe00c-da7b-408d-96f1-fccf762501a0.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f912a7d7532e5c43d354849e4e946ab2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fc998d33cdf37c272f79cfd64b7b99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c1e75eb744576c32eed3f9d20f9558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】在一次数学活动中,老师准备三张完全相同的纸片,纸片上分别写有如图所示图形的一个条件:①AD=BC;②AB∥DC;③AO=OC,小明同学从三张纸片中任意抽取两张.请你用树状图或表格表示出抽取两张纸片上的条件所有可能出现的结果(用序号表示),并求出上述条件下四边形ABCD是平行四边形的概率.
![](https://img.xkw.com/dksih/QBM/2020/6/2/2476121412476928/2476184867864576/STEM/3082d181c8b24879a2a9d35fbf2b9341.png?resizew=149)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】[问题提出]我们知道:同弧或等弧所对的圆周角都相等,且等于这条弧所对的圆心角的一半,那么在一个圆内同一条弦所对的圆周角与圆心角之间又有什么关系呢?
[初步思考]
(1)如图1,
是
的弦,
,点
、
分别是优弧
和劣弧
上的点,则
______
,
_____
;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/86192350-c6db-4d44-847c-17a161c571c3.png?resizew=126)
(2)如图2,
是
的弦,圆心角
,点
是
上不与
、
重合的一点,求弦
所对的圆周角
的度数为_______________;(用m的代数式表示)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/ae180911-fda5-4bec-a002-1eed488cdb77.png?resizew=123)
[问题解决]
(3)如图3,已知线段
,点
在
所在直线的上方,且
,用尺规作图的方法作出满足条件的点C所组成的图形(① 直尺为无刻度直尺;② 不写作法,保留作图痕迹);
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/2162c6ea-191a-43a8-9b8c-c89ab1c6be38.png?resizew=106)
[实际应用]
(4)如图4,在边长为6的等边三角形
中,点
、
分别是边
、
上的动点,连接
、
,交于点
,若始终保持
,当点E从点A运动到点C时,点P运动的路径长是__________________.
[初步思考]
(1)如图1,
![](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/950a96f120b449d9cf5c1709867c3d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc95b1289f7f443d3137ed960c8b406.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c134bff1d7144fe568d492660c54c22a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/86192350-c6db-4d44-847c-17a161c571c3.png?resizew=126)
(2)如图2,
![](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/2a9e67f55689808b2eab465a7b577df4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/cb686e4f5e3938575bc547e849d5513f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/ae180911-fda5-4bec-a002-1eed488cdb77.png?resizew=123)
[问题解决]
(3)如图3,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a0946888ae70f1d37116c2d3867720.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/2162c6ea-191a-43a8-9b8c-c89ab1c6be38.png?resizew=106)
[实际应用]
(4)如图4,在边长为6的等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/60ef95894ceebaf236170e8832dcf7e3.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/0ddc3690-77cd-4308-8482-f06b2f2fb6e7.png?resizew=126)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】已知:如图,点B、E、C、F在一条直线上,AB∥DE,AB=DE.BC=EF;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/0e1e99f0-4678-4d7c-b89d-08ee61b249a1.png?resizew=235)
(1)求证:△ABC≌△DEF;
(2)若点E为BC中点,EC=6,求线段BF的长度.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/0e1e99f0-4678-4d7c-b89d-08ee61b249a1.png?resizew=235)
(1)求证:△ABC≌△DEF;
(2)若点E为BC中点,EC=6,求线段BF的长度.
您最近一年使用:0次