如图,已知
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/5/951e937d-03eb-441a-b85d-429e63a452d5.png?resizew=167)
(1)
,
,求
得度数.
(2)猜想
、
、
三者之间的关系并加说明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d40e403b138555d6a6fe99b26ee7eb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/5/951e937d-03eb-441a-b85d-429e63a452d5.png?resizew=167)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984d43b474babe90785fd6cd2fdfeb83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3dd543b5376dc25f7aa6dcb67f2d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b550eeeb76bf84c801349f9a43c769.png)
(2)猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8937b0f95de38bd419cb2a531fc8221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ef2a0048375c0c20114132b2518ba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b550eeeb76bf84c801349f9a43c769.png)
更新时间:2022-06-24 23:10:23
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】如图,AD是△ABC的角平分线,DE∥CA,交AB于点E,DF∥BA,交AC于点F.∠1与∠2相等吗?为什么?
![](https://img.xkw.com/dksih/QBM/2016/4/21/1574195572629504/1574195578740736/STEM/3763210f95cc4053ae4400a3f9a21236.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】已知,如图,在
中,
平分
,
于点
,交
于点
,
交
于点
.求证:
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/ee73452ee4d5437f1399f1235b95e55f.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/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27bc78604ee7b6e013980b72686f9ca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/7d502fff-ada8-454e-bf67-09079f7fdafa.png?resizew=157)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐1】已知,AB//CD,(1)如图,若 E 为 DC 延长线上一点,AF、CG 分别为∠BAC、∠ACE 的平分线, 求证:AF//CG.
![](https://img.xkw.com/dksih/QBM/2019/8/1/2259624707719168/2266309514313728/STEM/2d8de29b03ef408fa0bad7c070c52e30.png?resizew=246)
(2)若 E 为线段 DC 上一点(E 不与 C 重合),AF、CG 分别为∠BAC、∠ACE的平分线,画出图形,试判断 AF,CG 的位置关系,并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2019/8/1/2259624707719168/2266309514313728/STEM/2d8de29b03ef408fa0bad7c070c52e30.png?resizew=246)
(2)若 E 为线段 DC 上一点(E 不与 C 重合),AF、CG 分别为∠BAC、∠ACE的平分线,画出图形,试判断 AF,CG 的位置关系,并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2019/8/1/2259624707719168/2266309514313728/STEM/236178d623a34902bc586737dc164ff2.png?resizew=179)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
【推荐2】如图,∠ABC内有一点P,利用直尺和三角板画出图形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/21/44b3922b-4fe6-476b-82cc-d76830799bc2.png?resizew=168)
(1)过点P画PD∥AB交BC于点D,画PE∥BC交AB于点E;
(2)若∠ABC=55°,则∠BEP度数为________.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/21/44b3922b-4fe6-476b-82cc-d76830799bc2.png?resizew=168)
(1)过点P画PD∥AB交BC于点D,画PE∥BC交AB于点E;
(2)若∠ABC=55°,则∠BEP度数为________.
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】【问题背景】同学们,观察小猪的猪蹄,你会发现一个熟悉的几何图形,我们就把这个图形的形象称为“猪蹄模型”,猪蹄模型中蕴含着角的数量关系.
(1)如图1,
,
为
、
之间一点,连接
、
,得到
与
、
之间的数量关系,并说明理由
【类比迁移】
(2)请你利用上述“猪蹄模型”得到的结论或解题方法,完成下面的问题:
如图2,直线
.若
,
,
,求
的度数;
【灵活应用】
(3)如图3,直线
,若
,
,则
__________度.
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
【类比迁移】
(2)请你利用上述“猪蹄模型”得到的结论或解题方法,完成下面的问题:
如图2,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71723e81b9010ff9611b551eb796005d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf83f97ee9715bb2f87e0e4b4ddfc1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853994cf4297b83657d29987632796d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eedcf56d3911d2d45f9e492004e40c43.png)
【灵活应用】
(3)如图3,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78ac470153cb8e0da706eff4cf32c8b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39fc7916f9d6906432c3f03caf339b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7960538cb70fcf641b94864a90190d.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】如图,已知
,垂足为点N,
与
交于点M.求证:
.(用反证法证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317a33aad1fe8911728aecb5546cc078.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/6a0b29cc24e75be59cbaa5c60a4b4c6e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/13/4ad6a014-a76f-492e-9ef5-2adc75965bdc.png?resizew=191)
您最近一年使用:0次