如图,在
中,
,D是
边上一点,
垂直平分
,交
于点E,交
于点F,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/8d173f1e-db0c-46ee-869d-9eb196864682.png?resizew=89)
(1)说明:
;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/8d173f1e-db0c-46ee-869d-9eb196864682.png?resizew=89)
(1)说明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0aa4c793921fdaa5d430cb90d78ca6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0ff311a5afd6b983f03efb1a9b6af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
更新时间:2023-12-11 14:45:33
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是
的直径,点
是
的中点,连接
,
,
,
.
;
(2)若
,
,求
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6ffb78dad3375efa3b08ab518553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a58e53c5f154c94d35e3cf418e1e602.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d8b64ae5ebb831b1d03316e89f4aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,四边形
内接于
,
是直径,点D是
的中点.
;
(2)连接
交
于点E,若
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9672cc271c7f79973c34a1e179782762.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,边
的垂直平分线
与边
的垂直平分线
交于点
,分别交
于点
、
,已知
的周长
.
![](https://img.xkw.com/dksih/QBM/2020/3/6/2413937006993408/2414557588676608/STEM/07e1619e9d2544a794945ca958a699d9.png?resizew=219)
(1)求
的长;
(2)分别连接
、
、
,若
的周长为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a9eed64d225267a58cd001db67e2a3.png)
![](https://img.xkw.com/dksih/QBM/2020/3/6/2413937006993408/2414557588676608/STEM/07e1619e9d2544a794945ca958a699d9.png?resizew=219)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)分别连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f66a8aa1d735b9b2ac2d8a373a553a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d51b21602ca6906279ecb645bfd12fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
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解答题-作图题
|
适中
(0.65)
名校
【推荐2】在Rt△ABC中,
.
(1)在
上找一点
,使
;(要求:尺规作图,保留作图痕迹,不写作法)
(2)在(1)的条件下,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bcc4c6a92c95af68a2e1ec8b92394c0.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/73fe8e7b-23f1-4794-a872-309b367cea37.png?resizew=178)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】定义:如果三角形有两个内角的差为
,那么这样的三角形叫做“准等边三顶角”.
【理解概念】
(1)顶角为
的等腰三角形 “准等边三角形”.(填“是”或“不是”),
并说明理由.
【巩固新知】
(2)已知
是“准等边三角形”,其中
,
.求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
【理解概念】
(1)顶角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
并说明理由.
【巩固新知】
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee54b9b398ce80cd054b56173fe810f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c554100e16141964f74a5a743f6b29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图1,在△ABC中,∠ACB=90°,BC=2,∠A=30°,点E,F分别是线段BC,AC的中点,连接EF.
![](https://img.xkw.com/dksih/QBM/2020/4/2/2432981048500224/2433157588656128/STEM/bd19f19cad574fd090fdd9d6baed8854.png?resizew=425)
(1)说明线段BE与AF的位置关系和数量关系;
(2)如图2,当△CEF绕点C顺时针旋转α(0°<α<90°)时,连接AF,BE,(1)中的结论是否仍然成立?如果成立,请证明;如果不成立,请说明理由;
(3)如图3,当△CEF绕点C顺时针旋转α(0°<α<180°)时,延长FC交AB于点D,如果AD=6﹣2
,求旋转角α的度数.
![](https://img.xkw.com/dksih/QBM/2020/4/2/2432981048500224/2433157588656128/STEM/bd19f19cad574fd090fdd9d6baed8854.png?resizew=425)
(1)说明线段BE与AF的位置关系和数量关系;
(2)如图2,当△CEF绕点C顺时针旋转α(0°<α<90°)时,连接AF,BE,(1)中的结论是否仍然成立?如果成立,请证明;如果不成立,请说明理由;
(3)如图3,当△CEF绕点C顺时针旋转α(0°<α<180°)时,延长FC交AB于点D,如果AD=6﹣2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,在△ABC中,已知AB=BC,∠ABC=90°,点P是斜边AC上一点,作射线BP,过点A作AD
BP于点D,过点C作CE
BP于点E.
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898552282775552/2899164459573248/STEM/f3d5bd51-1824-45f2-8ad2-0870ce3d51ea.png?resizew=185)
(1)依题意补全图形(不用尺规作图),并求证AD=BE;
(2)若AP=BC,△BPC的面积为9,求CE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898552282775552/2899164459573248/STEM/f3d5bd51-1824-45f2-8ad2-0870ce3d51ea.png?resizew=185)
(1)依题意补全图形(不用尺规作图),并求证AD=BE;
(2)若AP=BC,△BPC的面积为9,求CE的长.
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,在四边形ABCD中,对角线AC,BD相交于点E,∠DAB=∠CDB=90°,∠ABD=45°,∠DCA=30°,AB=
.
(1)求AE的长.
(2)求△ADC的面积.
(3)若Q是AB的中点,P是DB边上的点,连接AP和PQ得到△APQ,试探究△APQ的周长是否存在最小值?若存在,请求出△APQ周长的最小值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
(1)求AE的长.
(2)求△ADC的面积.
(3)若Q是AB的中点,P是DB边上的点,连接AP和PQ得到△APQ,试探究△APQ的周长是否存在最小值?若存在,请求出△APQ周长的最小值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2021/3/28/2687866599006208/2688201020948480/STEM/43b3dbb2517541c5b7c19006f732482c.png?resizew=255)
您最近一年使用:0次