如图,在Rt△ABC中,∠C=90°,点P为AC边上的一点,将线段AP绕点A顺时针方向旋转(点P对应点P′),当AP旋转至AP′⊥AB时,点B、P、P′恰好在同一直线上,此时作P′E⊥AC于点E
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/e7dab4f6-c860-4338-8c04-da716a06f88b.png?resizew=203)
(1)求证:∠CBP=∠ABP;
(2)求证:AE=CP;
(3)当
,BP′=
时,求线段AB的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/e7dab4f6-c860-4338-8c04-da716a06f88b.png?resizew=203)
(1)求证:∠CBP=∠ABP;
(2)求证:AE=CP;
(3)当
![](https://img.xkw.com/dksih/QBM/2013/9/28/1573688333467648/1573688339161088/STEM/0464eae195014e1a89e818f4fcf2a354.png)
![](https://img.xkw.com/dksih/QBM/2013/9/28/1573688333467648/1573688339161088/STEM/04b759c50265405fbbd7e086e81ad03c.png)
更新时间:2019-01-30 18:14:09
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相似题推荐
解答题-证明题
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【推荐1】如图,五边形
中,
,
,
,
为
的中点,连接
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490335364186112/2492940390473728/STEM/427d5fa7-7bfe-40cc-a1a0-126d1e5202bf.png)
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2291de85a2a29ff360a4515cce99c804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3620030e8808da46df97330103827913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2151388a129f019c64301dfbee190c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490335364186112/2492940390473728/STEM/427d5fa7-7bfe-40cc-a1a0-126d1e5202bf.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa30a9ee227af2b387cf6e028c20d7d.png)
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【推荐2】如图,在▱ABCD中,A(﹣10,0),B(﹣2,0),C(O,4).点P,Q分别是线段OA,CD上的点,OP=2DQ,连接PQ,PC,记DQ=x,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/29/b60f94f9-eaea-4700-b3c3-eb1a65a17743.png?resizew=309)
(1)当x为何值时,PQ
AD.
(2)是否存在x,使点Q到PC的距离是4,若存在,求出的x值;若不存在,请说明理由.
(3)作点Q关于直线PC对称点Q',当Q'落在坐标轴上时,请求出满足条件的x的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/29/b60f94f9-eaea-4700-b3c3-eb1a65a17743.png?resizew=309)
(1)当x为何值时,PQ
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
(2)是否存在x,使点Q到PC的距离是4,若存在,求出的x值;若不存在,请说明理由.
(3)作点Q关于直线PC对称点Q',当Q'落在坐标轴上时,请求出满足条件的x的值.
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名校
【推荐3】根据以下素材,探索完成任务.
如何确定拍照打卡板 | ||
素材一 | 设计师小聪为某商场设计拍照打卡板(如图1),图2为其平面设计图.该打卡板是轴对称图形,由长方形![]() ![]() ![]() ![]() ![]() | |
素材二 | 因考虑牢固耐用,小聪打算选用甲、乙两种材料分别制作长方形![]() ![]() |
|
问题解决 | ||
任务一 | 推理最大高度 | 小聪说:“如果我设计的方案中![]() ![]() |
任务二 | 探究等腰三角形 | 假设![]() ![]() |
任务三 | 确定拍照打卡板 | 小聪发现他设计的方案中,制作拍照打卡板的总费用不超过180元,请你确定![]() |
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解题方法
【推荐1】【原题初探】(1)小明在数学作业本中看到有这样一道作业题:如图1,
是正方形
内一点,连结
,
,
现将
绕点
顺时针旋转
得到的
,连接
.若
,
,
,求
的长和正方形
的边长.
![](https://img.xkw.com/dksih/QBM/2020/10/29/2581698260508672/2585158286385152/STEM/28baea536e374ea3815cf8e296d25971.png?resizew=178)
【变式猜想】(2)如图2,若点
是等边
内的一点,且
,
,
,请猜想
的度数,并说明理由.
【拓展应用】(3)聪明的小明经过上述两小题的训练后,善于反思的他又提出了如下的问题:如图3,在四边形
中,
,
,
,请求出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53502463cc76201000e02df314e58769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6989eb2deafca26e239ffa32d62c7315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364d6c88726d8c3bb8ed297057332bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c327b3e91d8bea53255d9308a952a276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fddda9e7f4d7140bf357d76c9e23d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2020/10/29/2581698260508672/2585158286385152/STEM/a363a47749ba4eb898c54452fcae9f9e.png?resizew=107)
![](https://img.xkw.com/dksih/QBM/2020/10/29/2581698260508672/2585158286385152/STEM/9c6fdf13-16b7-489e-a6fe-e8affb132905.png)
![](https://img.xkw.com/dksih/QBM/2020/10/29/2581698260508672/2585158286385152/STEM/28baea536e374ea3815cf8e296d25971.png?resizew=178)
【变式猜想】(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b336e518ac4ff04c6c26e4b8a15844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43c2d5aae759fc4db16115c8188ceec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
【拓展应用】(3)聪明的小明经过上述两小题的训练后,善于反思的他又提出了如下的问题:如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2894a6ff5b198184fffcaa1d03a33227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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【推荐2】如图,在正方形
中,
、
分别是
、
上的点,且
,
于点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345c91c9e67e6ee00a872078ab17f094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/909f864182c1bb8ec8ed148ee8372908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://img.xkw.com/dksih/QBM/2022/10/7/3082712516689920/3118868817272832/STEM/e064a63e038f4a6786f73da0b86bab2a.png?resizew=146)
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解答题-问答题
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适中
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【推荐1】如图1,在平面直角坐标系中,直线
过点
,
,与
轴交于点
.点
,
分别为线段
,
上的一点(不含端点),且
.
和
的值;
(2)当
与
中的一个角相等时,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df06d42d37cb8909f31849aa5458895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823099d18b79aad79a43d30704291aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8810790922f694bd8402a7b7d3b2d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbb52f9b226b1db3f6f9f055948bd38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598486f8c5ac28b1165b76e78105979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
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【推荐2】如图1,
是
的外接圆,点
在
上,点
在
上,连接
交
于点
,过点
作
的切线
与
的延长线交于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/2643072c-4c53-45ee-adbc-1d9850dcf0d0.png?resizew=378)
(1)求证:
;
(2)如图2,连接
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/2643072c-4c53-45ee-adbc-1d9850dcf0d0.png?resizew=378)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/791e846aca8e0ceff9274a54d219a1aa.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3cf42e316802f51b8a4092f5f8756d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
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