如图,已知,AB∥CD,CE平分∠ACD交AB于点E.
(1)若∠FCD=50°,求∠1的度数;
(2)若∠FAB的平分线AP交CE于点P,请判断∠CAP与∠ACP的数量关系,并说明理由.
(1)若∠FCD=50°,求∠1的度数;
(2)若∠FAB的平分线AP交CE于点P,请判断∠CAP与∠ACP的数量关系,并说明理由.
更新时间:2021-09-08 17:12:58
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【推荐1】点
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仍然平分
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(3)若将
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仍然平分
,请写出
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(1)如图1,
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(2)若将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
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(3)若将
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【推荐2】如图,已知直线EF与AB交于点M,与CD交于点O,OG平分∠DOF,若∠COM=120°,∠EMB=
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(1)求∠FOG的度数;
(2)写出一个与∠FOG互为同位角的角;
(3)求∠AMO的度数.
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(1)求∠FOG的度数;
(2)写出一个与∠FOG互为同位角的角;
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解答题-证明题
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【推荐1】如图,
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(1)求证:
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【推荐2】如图,△ABC中,AB=AC,D为BC边的中点,AF⊥AD,垂足为A.求证:∠1=∠2
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【推荐3】已知AB∥CD,点F、G分别在AB、CD上,且点E为射线FG上一点.
![](https://img.xkw.com/dksih/QBM/2022/1/10/2898036121436160/2945163476459520/STEM/ae99b0a4-3f0c-4961-9ff0-689effe68b53.png?resizew=538)
(1)如图1:当点E在线段FG上时,连接AE、DE,易得
.
小明给出的理由是:如图1,过E作EH∥AE,
∵AB∥CD,
∴AB∥CD∥EH.(平行于同一条直线的两条直线互相平行)
∴
,
,(依据1)
∴
;(依据2)
填空:依据1:_____________________________________________.
依据2:___________________________________________________.
(2)如图2,当点E在FG延长线上时,求证:
;
(3)如图3,AI平分∠BAE,DI交AI于点I,交AE于点K,且
,
,
,求∠EKD的度数.
![](https://img.xkw.com/dksih/QBM/2022/1/10/2898036121436160/2945163476459520/STEM/ae99b0a4-3f0c-4961-9ff0-689effe68b53.png?resizew=538)
(1)如图1:当点E在线段FG上时,连接AE、DE,易得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c1de1967bc005d9bd4b9634abd1322.png)
小明给出的理由是:如图1,过E作EH∥AE,
∵AB∥CD,
∴AB∥CD∥EH.(平行于同一条直线的两条直线互相平行)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9946b27126e1106822bb2add0f820a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c00937cc9c8e53d7fa38142588baded5.png)
∴
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填空:依据1:_____________________________________________.
依据2:___________________________________________________.
(2)如图2,当点E在FG延长线上时,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79eb64ded9067cceb2a1d5605bf146b2.png)
(3)如图3,AI平分∠BAE,DI交AI于点I,交AE于点K,且
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