如图,点
是
上一点.
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983500552331264/2984882968870912/STEM/5ba652d6-d43e-45cb-ba7a-99b05806111d.jpg?resizew=144)
(1)请用直尺和圆规过点
作出
的一条切线;(不要求写出作法,不要求证明,但要保留作图痕迹)
(2)若(1)所作切线上取一点
,满足
,若半径为2,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983500552331264/2984882968870912/STEM/5ba652d6-d43e-45cb-ba7a-99b05806111d.jpg?resizew=144)
(1)请用直尺和圆规过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若(1)所作切线上取一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
更新时间:2022-05-22 14:22:51
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】已知,如图在
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/21d7d07e-b0e8-4ff2-a7d3-e7ab6983876a.png?resizew=251)
(1)请用无刻度的直尺和圆规,画出
中
边上的中线
;(作图要求:保留痕迹,不写作法.)
(2)请只用无刻度的直尺,画出
中
边上的高
,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/21d7d07e-b0e8-4ff2-a7d3-e7ab6983876a.png?resizew=251)
(1)请用无刻度的直尺和圆规,画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)请只用无刻度的直尺,画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.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】如图所示,菱形
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/84715a96-0eda-46ce-9c98-cd00a34ec53a.png?resizew=241)
(1)请用尺规完成以下基本作图:作
的垂直平分线
,垂足为点
,交
于点
,连接
.(不要求写作法,保留作图痕迹)
(2)推理填空:在(1)的条件下,若
,求
的度数.
解:∵四边形
是菱形,
∴
,
,
∴
,
∵
,
∴
________,( )
,
∵
垂直平分
,
∴
________,
∴
________
,( )
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/84715a96-0eda-46ce-9c98-cd00a34ec53a.png?resizew=241)
(1)请用尺规完成以下基本作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)推理填空:在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b30bca5d706eb899b4a5479fa3dca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1a13346c7971d064ef14cecd9a9ed5.png)
解:∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46400f12f6bda992e3821682dbddfde0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b755ee4dda4a72063c6fba125720a4.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b825097bd21be9f63fedcd096a98f93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c5ad57dd6253412b7d4257d89a77d6.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5f441402ee632377b6bedeb060f3d9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe405c5b31ac1a299dcf9ebf1c48ec8.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51dd4e7ee82f63b7543357c3fcce3407.png)
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解答题-作图题
|
适中
(0.65)
名校
【推荐1】(1)已知△ABC中,∠A=20°,∠B=40°,请画一条直线,把这个三角形分割成两个等腰三角形.(请你选用下面给出的备用图,把所有不同的分割方法都画出来.只需画图,不必说明理由,但要在图中标出相等两角的度数)
(2)已知△ABC中,∠A是其最小的内角,过顶点C的一条直线把这个三角形分割成了两个等腰三角形,请探求∠ACB与∠A之间的关系.
(2)已知△ABC中,∠A是其最小的内角,过顶点C的一条直线把这个三角形分割成了两个等腰三角形,请探求∠ACB与∠A之间的关系.
![](https://img.xkw.com/dksih/QBM/2021/9/3/2800227460759552/2801449845628928/STEM/92199832-8058-4bf8-9962-e23a3a97ddfb.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐2】如图,长方形ABCD中AD=10,AB=4,点Q是BC的中点,点P在AD边上运动,△BPQ是等腰三角形时,用尺规在AD上标出所有的P点,并用P1、P2等表示出来,要保留作图痕迹.
![](https://img.xkw.com/dksih/QBM/2019/10/24/2318946970771456/2320958272831488/STEM/037c0f2804d24f00a5f6d15de6c7b0e7.png?resizew=146)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图1,在等腰直角三角形ADC中,∠ADC=90°.AD=4.点E是AD的中点,以DE为边作正方形DEFG,连接AG,CE.将正方形DEFG绕点D顺时针旋转,旋转角为a(0°<a<90°).如图2,在旋转过程中.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/30f74ed0-e962-4a98-8557-f0b42b76467b.png?resizew=301)
(1)判断
与
是否全等,并说明理由;
(2)当
时,
与
交于点
,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/1/30f74ed0-e962-4a98-8557-f0b42b76467b.png?resizew=301)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29618a1d688de8d6e9f7a182621e3f75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd75c2244c18120b8fc35d5d309ab66.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1d267eeb09c171c3e847f0597be31c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
名校
【推荐2】如图1,已知直线y=﹣2x+4与两坐标轴分别交于点A、B,点C为线段OA上一动点,连接BC,作BC的中垂线分别交OB、AB交于点D、E.
![](https://img.xkw.com/dksih/QBM/2015/9/22/1573912879325184/1573912885190656/STEM/0f33d7dda77543f68114611977482599.png?resizew=256)
(l)当点C与点O重合时,DE= ;
(2)当CE∥OB时,证明此时四边形BDCE为菱形;
(3)在点C的运动过程中,直接写出OD的取值范围.
![](https://img.xkw.com/dksih/QBM/2015/9/22/1573912879325184/1573912885190656/STEM/0f33d7dda77543f68114611977482599.png?resizew=256)
(l)当点C与点O重合时,DE= ;
(2)当CE∥OB时,证明此时四边形BDCE为菱形;
(3)在点C的运动过程中,直接写出OD的取值范围.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是
的直径,
切
于点
,点
是
上的一点,且
,
.
![](https://img.xkw.com/dksih/QBM/2019/3/4/2153294066073600/2155299512590336/STEM/48d1752fc2254acf928d8a8fe6ef594f.png?resizew=196)
(1)求证:
是
的切线;
(2)若
的半径为2,求弦
及
,
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15b82151bff7cc0238d2034a6129f0.png)
![](https://img.xkw.com/dksih/QBM/2019/3/4/2153294066073600/2155299512590336/STEM/48d1752fc2254acf928d8a8fe6ef594f.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
真题
名校
【推荐2】如图,在菱形
中,对角线
相交于点
经过
两点,交对角线
于点
,连接
交
于点
,且
.
是
的切线;
(2)已知
的半径与菱形的边长之比为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6c7f8958e6397ba505a41ac793657e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65436512ecbaefba4ac8123c55094211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f01f9333cdeb7994bdd01f534b256448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41a8f74c12963f45e6ed35ca0cd7e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32853eb0d2be032f3910877cc34e60c.png)
您最近一年使用:0次