如图,
为
的直径,C为圆上的一点,D为劣弧
的中点,过点D作
的切线与
的延长线交于点P,与
的延长线交于点F,
与
交于点E.
(1)
;
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0149042919dc906f07c32c3c4332e282.png)
(3)若
的半径为
,
,求
的长度;
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ee4f4a6fbfb1ae3018de415dd265a2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0149042919dc906f07c32c3c4332e282.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
2023·贵州铜仁·三模 查看更多[3]
更新时间:2024-03-16 21:25:30
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】定义:对角线互相垂直的圆内接四边形称为圆的神奇四边形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/d234d645-7690-4afe-9735-56cf3e2512d2.png?resizew=465)
(1)如图1,已知四边形
是
的神奇四边形,若
,
,则
__________;
(2)如图2,已知四边形
为
的内接四边形,连接
,
,
,
,满足
,求证:四边形
是
的神奇四边形;
(3)如图3,已知四边形
是
的神奇四边形,
,延长
,
相交于点E,若
,
,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/d234d645-7690-4afe-9735-56cf3e2512d2.png?resizew=465)
(1)如图1,已知四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c85409e4c685f7dbadae2de3cf9a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32995b3d5327ca12ed93c5bd41678a4a.png)
(2)如图2,已知四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed778bb43c96fc56fcf9ccdffa980fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)如图3,已知四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f979d5406af7e951f386dbb55a9617eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图所示,
,
是
的两条平行弦,
是
的垂直平分线,求证:
垂直平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2019/6/10/2222633820299264/2224122794500097/STEM/40c07f281b4a417d870bb968dc4a4b48.png?resizew=137)
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解答题-证明题
|
适中
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【推荐1】与圆相关的定理,我们在初中阶段已经学习了很多.例如:垂径定理、圆周角定理和切线长定理等.实际上,与圆相关的定理还有很多,比如下面的定理:若内接于圆的四边形的对角线互相垂直,则圆心到一边的距离等于这条边所对的边的一半,如下给出了不完整的“已知”,请补充完整,并证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ba0b4164-2e27-4cc4-b2a5-4a9db2f2efdc.png?resizew=134)
已知:四边形
是
的内接四边形,________,过点O作
于点E.求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ba0b4164-2e27-4cc4-b2a5-4a9db2f2efdc.png?resizew=134)
已知:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e94633285fd100c13a7cd4d13fad631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378125857c5ce8e364c01bd25ad0aad7.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】已知:如图,在
中,
,以
为直径的
交
于点D,过点D作
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/a3747600-e110-47ef-9051-94dc53f273ed.png?resizew=145)
(1)求证:
是
的切线;
(2)若
,
的半径等于5,求线段
的长.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.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/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/a3747600-e110-47ef-9051-94dc53f273ed.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8281856895bb615218949a50f5f27ff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,已知⊙O是以AB为直径的圆,C为⊙O上一点,D为OC延长线上一点,BC的延长线交AD于E,∠DAC=∠DCE.
(1)求证:AD为⊙O的切线;
(2)求证:DC2=ED•DA;
(3)若AB=2,sinD=
,求AE的长.
(1)求证:AD为⊙O的切线;
(2)求证:DC2=ED•DA;
(3)若AB=2,sinD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/2018/4/27/1933143240466432/1935452892577792/STEM/12e529f7d0c241e9aae34551576ff9fe.png?resizew=122)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,⊙O中,点A为
中点,BD为直径,过A作AP∥BC交DB的延长线于点P.
(Ⅰ)求证:PA是⊙O的切线;
(Ⅱ)若BC=2
,AB=2
,求sin∠ABD的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c876c9dbe6838fd64820e5a3449bb85.png)
(Ⅰ)求证:PA是⊙O的切线;
(Ⅱ)若BC=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30efdb9c7eb4b788352056f3edf21635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://img.xkw.com/dksih/QBM/2018/6/2/1958769819426816/1959200716480512/STEM/496c57d19a40445a960ae2f4e1dd1d03.png?resizew=143)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图1,Rt△ABC中,∠A=90°,∠B=45°,∠C的角平分线交边AB于D点,BD=
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/660a3b81-0b9e-43cd-aec5-ac7e9c3ad5c0.png?resizew=339)
(1)请求出AC的长;
(2)如图2,E为CD上的一个动点,AE⊥EF,AC⊥CF,EF交AC于G点,连接AF,当E点在CD间运动时,请判断
的值是否为一个定值,如果是请求出具体的值,不是,请说明理由;
(3)在(2)的条件下,若AE=EC,请求出△EGC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/660a3b81-0b9e-43cd-aec5-ac7e9c3ad5c0.png?resizew=339)
(1)请求出AC的长;
(2)如图2,E为CD上的一个动点,AE⊥EF,AC⊥CF,EF交AC于G点,连接AF,当E点在CD间运动时,请判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd01a4cbd347fce1a7414eb9fa73d16.png)
(3)在(2)的条件下,若AE=EC,请求出△EGC的面积.
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解答题-作图题
|
适中
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【推荐2】如图是由边长为1的正方形构成的网格,每个小正方形的顶点叫做格点.
的顶点在格点上,仅用无刻度尺的直尺在给定网格中画图,画图过程用虚线表示,画图结果用实线表示,按步骤完成下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/d314a44b-d74f-4e16-b364-4f35b931dda6.png?resizew=278)
(1)画出
关于
对称的线段
;
(2)在
的左侧画出格点
,满足
是以
为斜边的等腰直角三角形;
(3)连接
并延长交
于点
,直接写出
的值;
(4)在直线
上画点
,连接
,使
平分
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/d314a44b-d74f-4e16-b364-4f35b931dda6.png?resizew=278)
(1)画出
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bc3f93ceb05f20799a28a6aa99cab44.png)
(4)在直线
![](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/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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