如图,在直角坐标系中有一矩形
,
在
轴上,且
,
平行于
轴,且
,将矩形
沿
折叠,使得点
落在
边上的点
处,
是
轴上一动点,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f320075cb747d3a747bb6dd87c4814.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/39fffdb1-d90c-4b84-85f8-0641c8e8f3cd.png?resizew=217)
更新时间:2022-08-31 20:24:06
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【推荐1】如图,将正方形
放在平面直角坐标系中,O是坐标原点,点E的坐标为
,则点F的坐标为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b670c6d27ce68f17ac12c4efa1933db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad42625f296d2a4b65180e2f7b776beb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/d6497c10-b44d-4cae-9bac-053ee3970b99.png?resizew=161)
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【推荐2】对于平面内的图形
和图形
,记平面内一点P到图形
上各点的最短距离为d,点P到图形
上各点的最短距离为
,若
,就称点P是图形
和图形
的一个“等距点”.在平面直角坐标系
中,若直线
上存在到点
和直线
的等距点,则实数a的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fda993d38532293724009685288b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fda993d38532293724009685288b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
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解题方法
【推荐1】如图,将边长为8的正方形纸片
沿着
折叠,使点
落在
边的中点
处。点
落在点
处,
与
交于点
,则
的内切圆半径的长为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0800d7a18ba8f6341471043b528ea0bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b388b87b1dca3a2f9e7c2114d2c8b98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/27/825f1de5-231d-4f25-bb35-acb00b85b23c.png?resizew=144)
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【推荐2】如图,有一块直角三角形纸片,两直角边AC=12,BC=16,现将直角边AC沿AD折叠,使它落在斜边AB上,且与AE重合,则△ADB的面积为_____
![](https://img.xkw.com/dksih/QBM/2018/12/7/2091613366501376/2096119836966912/STEM/36e65d820f154301bb9d52a841f35c51.png?resizew=126)
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【推荐1】如图,将长方形ABCD沿AE折叠,使点D落在BC边上的点F处,若∠BAF=56°,则∠DAE=_______ .
![](https://img.xkw.com/dksih/QBM/2019/10/19/2314913598955520/2317709974470656/STEM/71449fa372fe4f5fac85d9443582d2b5.png?resizew=141)
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【推荐2】如图,在矩形ABCD中,AB=3,BC=4,点O为对角线AC的中点,点H为边BC上一点,连接OH,将△OCH沿OH翻折得到△OHF,若OF⊥BC于点E,则OH=______ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/6c1f6428-71b4-477e-8201-ad08c88a03be.png?resizew=159)
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【推荐1】如图,在等腰
中,
,
,
的平分线交
于点D,M、N分别是
和
上的动点,则
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fe75f967e8915c9124a5d4ac420a4e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://img.xkw.com/dksih/QBM/2023/1/8/3148533259141120/3159237925601280/STEM/bd2d3cbe2cc4421cbb15fb828dcf8b4c.png?resizew=135)
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【推荐2】如图,圆柱形玻璃杯高为
,底面周长为
,在杯内壁离杯上沿
的点
处粘有一粒面包渣,此时一只蚂蚁正好在杯外壁,离杯底
与面包渣相对的点
处,则蚂蚁从外壁
处到内壁
处的最短距离为_________
(杯壁厚度不计).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a79fa14c8f71cdd5af3ba00ac5824a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a9eed64d225267a58cd001db67e2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](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/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/1a376bf9-25f6-41f6-9f5c-b9decaa460bf.png?resizew=75)
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