如图,在正方形
中,对角线
相交于点O,
的平分线
交
于点E,交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/bebf5b31-f4c9-4858-97f4-78959e3fc2c9.png?resizew=158)
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e5c0dd1fab3ddac335bddbe89f0d6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03606fe8db46d4f190dc219373d304fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/bebf5b31-f4c9-4858-97f4-78959e3fc2c9.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a539a0930da7556594dd365878402d49.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
2023·浙江台州·一模 查看更多[2]
更新时间:2023-04-24 15:31:17
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,平行四边形
的对角线
,
交于点
,
平分
,交
于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/5f97f928-0d5c-444c-bec2-2350b94c930a.png?resizew=209)
(1)求证:
是等边三角形;
(2)若
,连接
,设
,试求
与
满足的关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.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/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/5f97f928-0d5c-444c-bec2-2350b94c930a.png?resizew=209)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6c3b2150e2b37b13d06efd8fb38448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef41205474b36f0b5b30a9c7683f89c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】如图,E为
上一点,
,
,
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/f9327e5e-c8a9-4388-ae71-075258a04cfe.png?resizew=163)
(1)求证:
;
(2)若
平分
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822ba132ca9dd0d4a050659aef3c9b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b455b110a30c1533d0a0657e0e48ac33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc5653b8818c02e71dc54027b175256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/f9327e5e-c8a9-4388-ae71-075258a04cfe.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66623c53c9228e58f4ac1503b0ec76f3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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名校
【推荐1】如图,已知E是
的平分线上一点,
,
,C,D是垂足,连接
,交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/b166345b-8cf6-46fd-ac27-d0421f6bb3ba.png?resizew=154)
(1)请回答:
是
的垂直平分线吗?说明理由;
(2)若
,猜想
之间有什么数量关系?说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28471c57aeae82b28310826851e2efb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f91df53f41b53bec267a9af714c6c17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/b166345b-8cf6-46fd-ac27-d0421f6bb3ba.png?resizew=154)
(1)请回答:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ea94e9db7929d366f7fe9208b57a7b.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】秦九韶(1208~1268年),字道古,南宋著名数学家,与李冶、杨辉、朱世杰并称宋元数学四大家.他精研星象、音律、算术、诗词、弓剑、营造之学,他于1247年完成的著作《数学九章》中关于三角形的面积公式与古希腊几何学家海伦的成果并称“海伦-秦九韶公式”.它的主要内容是,如果一个三角形的三边长分别是
,
,
,记
,
为三角形的面积,那么
.
中,
,
,请用上面的公式计算
的面积.
(2)如图1,在
中,
,
,
,
,垂足为
,求
的长;
(3)如图2,在
中,
,
,
,垂足为
,
的平分线交
于点
.求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f2d50ca5cc415bf6721faf2221d626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684c13a2cea962fb204256ca433a4d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c05bbc5dbc0cd9ba0414ee79f501db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8221601c7bd5c51fd520615581fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040819c1ee044ec6dc1dfb1dd8e3e9bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,已知正方形
和正方形
,点
在边
上,点
在边
的延长线上,连接
,并延长
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/ef0322d3-b5f0-44b7-9cd2-ff3b2bad76ce.png?resizew=178)
(1)求证:
∽
;
(2)如果
与
交于点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/ef0322d3-b5f0-44b7-9cd2-ff3b2bad76ce.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74cc118bd37e6fbfd196316b6a2ac842.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8d73ef9b370a7c31e5166b4a125389.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】(1)如图1,在正方形
,点E,F分别在边
和
上,
.求证:
;
(2)如图2,在矩形
中,将四边形
折叠,得到四边形
,
交
于点H,点A落在
边上的点E处,折痕交边
于F,交边
于G,连接
交
于点O.若
,且
,
,求
与
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73174acaee4a3db01d9ad730921a110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c4491b334748bceb87485a33b38638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ac16d192d4f0c34dc26f4a9fa17e7d.png)
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641dfaf05798a707be3b1f83e3bb08fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37e1ab004b1d3ef06c352b8f3bf5df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6cd332590b9eb4032b51a39134d219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af83aa2410d6ab5d74a984b8fd745cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c46b5c4b136a1ce9486d37ea98943bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d74a31c5387c7f618d4cef188d7bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a2e0b739038c0e756aa511920fa300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
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解答题-证明题
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【推荐1】如图,AB为⊙O的直径,C为⊙O上一点,BE与过点C的直线互相垂直,垂足为E,BC平分∠ABE,延长BA交直线CE于点D,连接AC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/0fd3fa2e-fc0b-4d34-ac9a-7cd2f49bd032.png?resizew=226)
(1)求证:DE为⊙O的切线;
(2)若BC=
,sin∠EDB=
,求⊙O的半径.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/0fd3fa2e-fc0b-4d34-ac9a-7cd2f49bd032.png?resizew=226)
(1)求证:DE为⊙O的切线;
(2)若BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
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适中
(0.65)
【推荐2】如图,点A(t,4)在第一象限,OA与x轴所夹的锐角为α,sinα=
,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0e7bfbd56fe73dfe04c04da749d942.png)
![](https://img.xkw.com/dksih/QBM/2018/12/27/2106049107607552/2109193094692864/STEM/230452cec3204aed954613fa892abbe9.png?resizew=158)
您最近一年使用:0次