如图,正方形
中,
为
边上一点,
于
,
于
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d0a308e3ab691b73ead35a65380c56.png)
(2)若
,
的面积为
,求
的长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93245f11637108d665be180fbeff4d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d92b7d584434d71d94044a1eb89172f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d0a308e3ab691b73ead35a65380c56.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cee0f36dc452e58086832c0152b641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ccbf98ff1b1f121ee3aa3dec108ba0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca74e3bfe66db258ab238ecf3b08b47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462538368286720/2463429928222720/STEM/8cbc3bab1e0f4ea9ae072bfe8acf9bad.png?resizew=115)
更新时间:2020-05-15 20:43:55
|
相似题推荐
解答题-证明题
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【推荐1】如图,在△ABC中,D是BC的中点,DE⊥AB,DF⊥AC,垂足分别是E、F,BE=CF.
(1)图中共有_________对全等三角形.
(2)求证:AD是△ABC的角平分线.
(1)图中共有_________对全等三角形.
(2)求证:AD是△ABC的角平分线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/21/5c12553d-58c7-46c6-8dde-3a991f5483d0.png?resizew=139)
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解答题-问答题
|
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【推荐2】上数学活动课时,欢欢为测量池塘两端
、
的距离,设计了如下方案:
(Ⅰ)如图1,现在平地上取一个可直接到达
、
的点
,连接
、
,并分别延长至点
、
,使
,
,最后测出DE的距离即为
的长;
(Ⅱ)如图2,先过
点作
的垂线
,再在
上取
、
两点,使
,接着过点
作
的垂线
,交
的延长线于点
,则测出DE的距离即为
的长.
![](https://img.xkw.com/dksih/QBM/2020/1/6/2371248935739392/2371967490441216/STEM/6992c4f1-1c0e-45f0-b915-598917fe6644.png)
阅读后回答下列问题:
(1)方案(Ⅰ)是否可行?请说明理由.
(2)方案(Ⅱ)是否可行?请说明理由.
(3)若方案(Ⅱ)仅满足
,
,则该方案______(填“可行”或“不可行”).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(Ⅰ)如图1,现在平地上取一个可直接到达
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f5434406acfefc5690608f18a7e02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb5314d911b5a764790da7edff43980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(Ⅱ)如图2,先过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2020/1/6/2371248935739392/2371967490441216/STEM/6992c4f1-1c0e-45f0-b915-598917fe6644.png)
阅读后回答下列问题:
(1)方案(Ⅰ)是否可行?请说明理由.
(2)方案(Ⅱ)是否可行?请说明理由.
(3)若方案(Ⅱ)仅满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a96359f4e97ad4b4e36d304e425b1c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐1】如图,
是
的高,点
分别在
上,点
在
上,四边形
是正方形,
,
.
(1)求证:
与
相似.
(2)求正方形
的边长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b5f27a5179dc6d59d373e92bcf4aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b43684eec0b36b0db786844f9dc2060c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532154765cfb3b045bd790e817fe0fd4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/c3143dca-bc78-4df2-936b-173a1850d5ef.png?resizew=134)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbd6f0a0412d0f43ce1f7c1d530e56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)求正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
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【推荐2】如图,四边形
是正方形,点F是
延长线上一点,连接
,
绕点A旋转一定角度后得到
,若
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/11/2899320701247488/2957158378766336/STEM/35696337-6052-4291-938b-40e5b0f4c48b.png?resizew=173)
(1)直接写出旋转角的度数;
(2)求
的长度;
(3)求证直线
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae341f580ff8fbf21f616fe900b0e4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e0c5cb53fd85b7a23f0580df6bb49a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/11/2899320701247488/2957158378766336/STEM/35696337-6052-4291-938b-40e5b0f4c48b.png?resizew=173)
(1)直接写出旋转角的度数;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)求证直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c252a0fe067d434a2b5aeac011b9914.png)
您最近一年使用:0次