求解下列各题
(1)如图(1),
,点
在
外部,若
,则
____![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)如图(2),
,点
在
内部,则
之间有何数量关系?证明你的结论;
(3)在图(2)中,将直线
绕点
按逆时针方向旋转一定角度交直线
于点
,如图(3),若
,求
的度数.
(1)如图(1),
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7357cdd4a054323536ec405ff20041fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ed5dc05a32116c94417dcb2d721868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)如图(2),
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc899358f0384b9590960c85b300d262.png)
(3)在图(2)中,将直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ff58e9b6a8001d47922cc389e30e063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7ee045dd981bfb7feb023d54230754.png)
更新时间:2023-06-17 16:42:02
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】在
中,
,
的平分线交于点
,过点
作
交
,
于点
,
.
与
,
之间的关系为 .
(2)如图2,在
中,
的平分线
与
的平分线
交于点
,过点
作
交
于点
,交
于点
.则(1)中的结论是否仍然成立?若成立,请证明;若不成立,请写出
与
,
之间的正确关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b3791f7eb4d33d52bf7a73c1b3e75f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9084c319e03e0754f65b657ef57ae6af.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】如图,AB是⊙O的直径,点C为⊙O上一点,AE和过点C的切线互相垂直,垂足为E,AE交⊙O于点D,直线EC交AB的延长线于点P,连接AC,BC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/2e472f49-1b48-4a5a-9b1e-de460aac531e.png?resizew=199)
(1)求证:AC平分∠BAD;
(2)若AB=6,AC=
,求EC和PB的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/2e472f49-1b48-4a5a-9b1e-de460aac531e.png?resizew=199)
(1)求证:AC平分∠BAD;
(2)若AB=6,AC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
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解答题-证明题
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适中
(0.65)
【推荐3】完成下面的证明:已知,如图,AB∥CD∥GH,EG平分∠BEF,FG平分∠EFD
求证:∠EGF=90°
证明:∵HG∥AB(已知)
∴∠1=∠3( )
又∵HG∥CD(已知)
∴∠2=∠4( )
∵AB∥CD(已知)
∴∠BEF+___________=180°( )
又∵EG平分∠BEF,FG平分∠EFD (已知)
∴∠1=( )∠BEF,∠2=( )∠EFD ( )
∴∠1+∠2=( ) (∠BEF +∠EFD)=( )
∴∠3+∠4=90°( )即∠EGF=90°
求证:∠EGF=90°
证明:∵HG∥AB(已知)
∴∠1=∠3( )
又∵HG∥CD(已知)
∴∠2=∠4( )
∵AB∥CD(已知)
∴∠BEF+___________=180°( )
又∵EG平分∠BEF,FG平分∠EFD (已知)
∴∠1=( )∠BEF,∠2=( )∠EFD ( )
∴∠1+∠2=( ) (∠BEF +∠EFD)=( )
∴∠3+∠4=90°( )即∠EGF=90°
![](https://img.xkw.com/dksih/QBM/2018/4/12/1922422776872960/1922981479931904/STEM/247c8131-e423-4ed3-9558-dd93a5cb2de8.png?resizew=174)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在等腰直角△ABC中,∠ACB=90°,AC=BC,点D是AB边上的一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/b5321d81-2612-4065-9120-12a3b4df11f0.png?resizew=331)
(1)如图1,连接DC并延长使CE=CD,过点E作
交AC的延长线于点F,试说明:AD=FE;
(2)如图2,当点D运动到AB中点时,点E是DC延长线上的一点,连接AE、BE,BE与AC的延长线交于点Q.
①试说明:∠CAE=∠CBE;
②点P是AC延长线上的点,连接PE,且PE=BE,连接BP,若AE=8,求△BEP的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/b5321d81-2612-4065-9120-12a3b4df11f0.png?resizew=331)
(1)如图1,连接DC并延长使CE=CD,过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c197d8b99f2eb7477947e53461b5d548.png)
(2)如图2,当点D运动到AB中点时,点E是DC延长线上的一点,连接AE、BE,BE与AC的延长线交于点Q.
①试说明:∠CAE=∠CBE;
②点P是AC延长线上的点,连接PE,且PE=BE,连接BP,若AE=8,求△BEP的面积.
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,
,点D,C分别在射线
上,
,垂足为点O,且
.求证:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf7dc43a39738e3e2a0b819be505c6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fbd0f56b46687f9635d4a3c3f7521a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0866e1551b61074ca8e61261ecd1f9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图1,在平面直角坐标系中,
、
、
,其中
满足:
.平移线段
得到线段
,使得
两点分别落在
轴和
轴上.
坐标__________,点
坐标__________;
(2)如图1,将点
向下移动1个单位得到点
,连接
、
,在
轴上是否存在点
,使得
与
面积相等?若存在,求出点
坐标;若不存在,说明理由;
(3)如图2,点
是射线
上一动点,与点
不重合,连接
不过点
,若
与
的平分线交于点
,直接写出
与
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc288a0493ddb41c80d1025f0e45c62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf846db01feecbbb16098215b55c61c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e810cb506e1746a0a49610e0d897f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f187667e9bdf7097e9b4a9904ba50f9.png)
![](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/8c29a7e8eea08197bf53164a560bee58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)如图1,将点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98246b9360d381235c048b7ecd16262a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b9ff626c7739277fd1f69fac48dc1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc72efba7097ada60b7dfe5ccdba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8407954a328c08add8decf551fa4340d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650362bbb54273f96eb35df79751b52c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66efb2e5b7aa63e8561be256d691fc88.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,在△ABC中,∠ABC、∠ACB的平分线BE,CD相交于点F,已知∠ABC=40°,∠A=60°,求∠BFD的度数.
![](https://img.xkw.com/dksih/QBM/2020/11/10/2589853363200000/2590152062648320/STEM/48564dc6-f844-4cbc-a82e-aee5244b6ed1.png)
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