如图,在
中,
,垂足为
.
(1)尺规作图(不写作法,保留作图痕迹):作
的外接圆
,作直径
,连接
;
(2)若
,
,
,求直径
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/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/eddd524f-60b8-420e-a0b7-3b879325dfa8.jpg?resizew=132)
(1)尺规作图(不写作法,保留作图痕迹):作
![](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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
更新时间:2023-10-10 15:54:11
|
相似题推荐
解答题-作图题
|
适中
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【推荐1】如图所示,已知线段
,
,求作等腰三角形,使腰长为
,底上的高为
(
,尺规作图,不写作法,保留作图痕迹).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
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解答题-问答题
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适中
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名校
【推荐2】(1)如图1,在锐角
的外部找一点
,使
的面积与
的面积相等且点
在以
为直径的圆上,请用尺规作图的方法确定点
的位置(不写作法,保留作图痕迹);
)中,如图
,若
,
且
,求以
为直径的圆覆盖
的面积 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f8939f8c274cb26a8a6a5fa2469087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-作图题
|
适中
(0.65)
【推荐3】(2019•房山区二模)阅读下面材料:小明遇到一个问题:如图,
,点
在射线
上,点
在
内部,用直尺和圆规作点
,使点
同时满足下列两个条件(要求保留作图痕迹,不必写出作法);
.点
到
,
两点的距离相等;
.点
到
的两边的距离相等.
小明的作法是:
①连接
,作线段
的垂直平分线交
于
,交
于
;
②作
的平分线交
于点
.
所以点
即为所求.
根据小明的尺规作图过程,
(1)使用直尺和圆规,补全图形;
(2)证明:
垂直平分线段
,点
在直线
上,
.
平分
,
点
到
的两边的距离相等 (填推理的依据).所以点
即为所求.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
小明的作法是:
①连接
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
②作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
所以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
根据小明的尺规作图过程,
(1)使用直尺和圆规,补全图形;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173f7d26d069c0f16a0f6fcb517aa28c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b88795a10016f3733b6cd6a6e328ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cd84460903114fae02d1c9e351aa12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/04c94c1c-a1c2-4edd-9eb4-76eedc9db7ac.png?resizew=150)
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解答题-证明题
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【推荐1】如图,AB是
的直径,点C、点D在
上,
,AD与BC相交于点E,点F在BC的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894438631612416/2933985855897600/STEM/ab7ef69d-116c-4dbd-8f14-8bae305a6819.png?resizew=201)
(1)求证:AF是
的切线;
(2)若
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212bfbd5575772ca36d6fc3e7b246e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25dd503ee6d494bda7e4099e12d0c27.png)
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894438631612416/2933985855897600/STEM/ab7ef69d-116c-4dbd-8f14-8bae305a6819.png?resizew=201)
(1)求证:AF是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec67259153551e67bb3e035d11dc9334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a8f35a882f2847ab533008caf126d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-证明题
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(0.65)
【推荐2】如图,
是
的直径,
内接于
,
平分
交
于点D,交
于点E,延长
至F,使
.
是
的切线;
(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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01009f2f3a3476fd1efe90291083132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb699d6b462bcccc9d00561d76330906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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解答题-作图题
|
适中
(0.65)
【推荐1】已知网格的小正方形的边长均为1,格点三角形ABC如图
所示,请仅使用无刻度的直尺,且不能用直尺中的直角,画出满足条件的图形(保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/2019/9/24/2297683000770560/2298468370735105/STEM/ad4d42b80a344208a13b7f511894433f.png?resizew=282)
(1)在图甲AB边上取点D,使得△BCD的面积是△ABC的
;
(2)在图乙中,画出△ABC所在外接圆的圆心位置.
![](https://img.xkw.com/dksih/QBM/2019/9/24/2297683000770560/2298468370735105/STEM/7b876f3e3f2a4bb4b0514fa95c782b95.png?resizew=3)
![](https://img.xkw.com/dksih/QBM/2019/9/24/2297683000770560/2298468370735105/STEM/ad4d42b80a344208a13b7f511894433f.png?resizew=282)
(1)在图甲AB边上取点D,使得△BCD的面积是△ABC的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(2)在图乙中,画出△ABC所在外接圆的圆心位置.
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解答题-作图题
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名校
【推荐2】如图,在
的方格中,
的顶点都在格点处.请仅用无刻度的直尺分别按下列要求作图.
(1)在图(1)中,过点
作出
的外接圆的一条直径
;
(2)在图(2)中,在
的右侧格点处找一点
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355bc0d6058a3dd1254ff395176ec55b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/21/0026a100-cdea-4979-a248-2a6cf3a2c323.png?resizew=407)
(1)在图(1)中,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)在图(2)中,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61db8f351f76d471792144fb2f7de6ff.png)
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解答题-证明题
|
适中
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【推荐1】如图,点P是菱形ABCD的对角线BD上一点,连接CP并延长交AD于点E,交BA的延长线于点F.
![](https://img.xkw.com/dksih/QBM/2022/9/11/3063975401758720/3064401367556096/STEM/8ec7446029bd4a99a40bcf04a0db7e95.png?resizew=191)
(1)求证:△APD≌△CPD;
(2)求证:△APE∽△FPA;
(3)若PE=4,PF=12,求PC的长.
![](https://img.xkw.com/dksih/QBM/2022/9/11/3063975401758720/3064401367556096/STEM/8ec7446029bd4a99a40bcf04a0db7e95.png?resizew=191)
(1)求证:△APD≌△CPD;
(2)求证:△APE∽△FPA;
(3)若PE=4,PF=12,求PC的长.
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解答题-证明题
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真题
名校
【推荐2】在△ABC中,P为边AB上一点.
(1)如图1,若∠ACP=∠B,求证:AC2=AP·AB;
(2)若M为CP的中点,AC=2,
① 如图2,若∠PBM=∠ACP,AB=3,求BP的长;
② 如图3,若∠ABC=45°,∠A=∠BMP=60°,直接写出BP的长.
(1)如图1,若∠ACP=∠B,求证:AC2=AP·AB;
(2)若M为CP的中点,AC=2,
① 如图2,若∠PBM=∠ACP,AB=3,求BP的长;
② 如图3,若∠ABC=45°,∠A=∠BMP=60°,直接写出BP的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/ae2030c3-4674-49b9-859a-6071cad46a2a.png?resizew=500)
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