已知为
的直径,点C,D为
上的两点,
的延长线与
的延长线交于点P,连接
.
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ace2f75c84b202e0b8257d60135d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)如图②,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714c08709c8c7ffe28ca8894f2eba278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
2021九年级下·天津·学业考试 查看更多[5]
2021年天津市初中毕业生学业考试数学试题(已下线)2021年天津市中考真题数学变式汇编5(已下线)第2章 对称图形-圆 能力提升卷(B卷)-2023-2024学年九年级数学上册《知识解读·题型专练》(苏科版)2023年江苏省南通市启东市中考二模数学模拟试题2023年江苏省南通市启东市中考数学二模模拟试题
更新时间:2023-10-06 12:05:19
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相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在平面直角坐标系中,点A的坐标为
,以线段
为边在第四象限内作等边三角形
,点C为x轴正半轴上一动点
,连接BC,以线段
为边在第四象限内作等边三角形
,连接
并延长,交y轴于点E.
(1)求证:
;
(2)在点C的运动过程中,
的度数是否会变化?如果不变,请求出
的度数;如果改变,请说明理由;
(3)当点C运动到什么位置时,以A、E、C为顶点的三角形是等腰三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f728f0f9b75493817a985082a2584c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfaad4c4467e27421876d8f2a4371d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/3bfd907c-8658-4934-9a9e-efb512bab470.png?resizew=259)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d1d80628a77e2a5f19f0b125f71f0bc.png)
(2)在点C的运动过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
(3)当点C运动到什么位置时,以A、E、C为顶点的三角形是等腰三角形?
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【推荐2】如图,矩形
的对角线
与
相交于点O,将
沿直线
折叠,点B的对应点记为点E,边
交
于点F,连接
.
(1)求证:
;
(2)若
,请判断四边形
的形状,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e738f6777a252fd346785ac38fcfc658.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/3cf30a74-5231-4f62-8fa5-f71403f0fd43.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e99cd1610de98c8332da8c4520aad6e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90f7efe2f99f5cb6801841171feab6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3827554ef88bce8ae0e3755b07443080.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,菱形
的对角线
,
相交于点O,E是
的中点,点F,G在
上,
,
.
是矩形;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b943f28a579221ff710c5fd323714ead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b670c6d27ce68f17ac12c4efa1933db1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26ad70d2b3aac8604834d57dfc59bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613dedf2d90e58591b7ac4a250ac7b5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,
和
都是等腰直角三角形,
,
的顶点E与
的斜边
的中点重合.将
绕点E旋转,旋转过程中,线段
与线段
相交于点P,射线
与线段
相交于点G,与射线
相交于点Q.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/9a41dcd2-94f3-4a12-a1d2-bdc7e5f10a3c.png?resizew=176)
(1)求证:
;
(2)当
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65633001f2eecfee015749ffb6fa4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](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/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/9a41dcd2-94f3-4a12-a1d2-bdc7e5f10a3c.png?resizew=176)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50d9813da18b6d4ec509e0e6f9470e5.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a0367c3fe3c5c5dfefec87f641bbde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b653e7137770669eb518f146e6e7e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,AB是⊙O的直径,D是
的中点,弦DH⊥AB于点E,交弦BC于点F,AD交BC于点G,连接BD,求证:F是BG的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://img.xkw.com/dksih/QBM/2020/5/19/2472285570113536/2522667667570688/STEM/a142f117798d41a1af941c84ab3dd1bc.png?resizew=184)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,以
的边
为直径作半圆,分别交边
于点D,E,点O为圆心,连接
.已知点E是弧
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/9aa493cf-bb1a-45c2-968a-1922e45c8157.png?resizew=150)
(1)求
的度数.
(2)若直径
,求阴影部分的面积.
![](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/4a6d50515fc65885d44cd6a3c41e6a7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd43346b5a8d5339004a5bc2257bd362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991d28fec5464134cececebc681e54ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/9aa493cf-bb1a-45c2-968a-1922e45c8157.png?resizew=150)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2460507a462453e084eaf70a7d867e9.png)
(2)若直径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
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【推荐1】如图,
是⊙
的直径,弦
与
相交于点
,过点
的切线
交
的延长线于点
,且
.
平分
;
(2)若
,
,求
的长;
(3)若
,求
的半径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/100b3e7dcd5f34c5234971cd75bff138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa30a4aff13e93330ad9fb1ad6c101a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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适中
(0.65)
【推荐2】如图,Rt
ABC中,∠C=90°,点O在边AB上,以O点为圆心、OB为半径作圆,分别与BC、AB相交于点D、E,连接AD,AD是⊙O的切线.
(1)求证:∠CAD=∠B;
(2)若BC=4,tanB=
,求⊙O半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(1)求证:∠CAD=∠B;
(2)若BC=4,tanB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2021/3/23/2684019274399744/2684644255981568/STEM/6b24355d6d0a4cbcb507c61e54fdcac4.png?resizew=160)
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