如图,已知点O在等边
的内部,
,
,以
为边作等边
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/006f0817-80b1-4a81-a385-90a85fa85d8c.png?resizew=149)
(1)求证:
;
(2)当
时,试判断
的形状,并说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11a1bcaff75f42da99fd3698cce042aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcbec8352ce3dbfbf3b173045d0ba8f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/006f0817-80b1-4a81-a385-90a85fa85d8c.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6889321d51141a71e88a1bb1b981fc4b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae35c644141e229ffbd649b69fc9847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
更新时间:2023-02-28 18:20:57
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在等边
中,已知点
在直线
上(不与点
、
重合),点
在直线
上,且
.
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755682563874816/2759376523214848/STEM/f0ed287f-d4bd-4c2e-8423-b80b3c404c52.png)
图1
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755682563874816/2759376523214848/STEM/475981ad-9c0d-4bb8-af6a-e585839206d2.png)
图2
(1)若点
为线段
的中点时,求证:
;
(2)若
的边长为2,
.求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f9a3935cd124d021c7b18b0f634915.png)
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755682563874816/2759376523214848/STEM/f0ed287f-d4bd-4c2e-8423-b80b3c404c52.png)
图1
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755682563874816/2759376523214848/STEM/475981ad-9c0d-4bb8-af6a-e585839206d2.png)
图2
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fb3596f603274e0d8083b76a67f4c7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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解答题-问答题
|
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(0.65)
名校
【推荐2】如图,在
和
中,
,
,
,连接
、
交于点
,
与
交于点
,
与
交于点
.试判断
、
之间的关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaffcd2070bfcb1955e2cab66c26c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/2fb945e2-9ad4-4d56-b6f3-ed0b2726df47.png?resizew=180)
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【推荐3】
(1)如图1,在
中,
,D是
边的中点,E、F分别是
、
边上的点.若B、E、F在一条直线上,且
,探究
与
的数量之间有何等量关系,并证明你的结论.
(2)为了丰富学生的业余生活,增强学生的身体素质,某体育课上老师组织学生进行传球训练.如图2所示,体育老师在地面画了一块
场地,已知
米,
米,D为
的中点,测得
的长为15米,受训练的两名同学E和F分别在
和
边上移动,老师站在C点位置给同学传球,先把球传给E同学,E同学再传给F同学,请求出所传球的运动路径最小值(即
的最小值).
(1)如图1,在
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97fd11ca340e16f2cead464342a9abd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)为了丰富学生的业余生活,增强学生的身体素质,某体育课上老师组织学生进行传球训练.如图2所示,体育老师在地面画了一块
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2f2da8428a8f3c8e3dd9d56ff01e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb262f3529a3e84959fe594b6628c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae411cf3a16317d5c087c2c0e60b2fb.png)
![](https://img.xkw.com/dksih/QBM/2022/1/10/2891488836534272/2944097149861888/STEM/66b4cc3b-f86f-46e5-8ef1-bc2aa0af5f94.png?resizew=282)
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解题方法
【推荐1】如图,在Rt△ABC中,∠C=90°,以BC为直径的⊙O交AB于E,OD⊥BC交⊙O于D,DE交BC于F,点P为CB延长线上的一点,延长PE交AC于G,PE=PF
(1)求证:直线PG为⊙O的切线;
(2)求证:GA=GE;
(3)判断OG与BE的位置关系,并说明理由.
(1)求证:直线PG为⊙O的切线;
(2)求证:GA=GE;
(3)判断OG与BE的位置关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/ea05ba25-35c9-4209-a132-92bb43d9d06e.png?resizew=209)
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【推荐2】已知:如图,在△ABC中,D为BC上的一点,AD平分∠EDC,且∠E=∠B,DE=DC,求证:AB=AC.
![](https://img.xkw.com/dksih/QBM/2011/7/28/1573228487524352/1573228561375232/STEM/55de9978-9046-4e53-b680-6b1a569d7cc4.png?resizew=163)
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解答题-证明题
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【推荐1】如图,在平面直角坐标系中,
为等边三角形,A点坐标为
,点B在y轴上且位于A点上方,以
为边向
的右侧作等边
,连接
,并延长
交x轴于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/45070688-fa02-4658-97ba-cbd409ed102a.png?resizew=197)
(1)求证:
;
(2)判断
是否平分
请说明理由;
(3)在y轴上是否存在点Q,使得
为等腰三角形?若存在,请直接写出满足条件的所有点Q的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d5b1313c6120ce1171344f8b377383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db89c88c5b81cb80bf87fe66f289255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af018556f0b484ed38519f2edc791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af018556f0b484ed38519f2edc791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f409b28f7cb97726646e79709ad25190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b49022a6f55817b5d7e3ab443b5491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b49022a6f55817b5d7e3ab443b5491.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/45070688-fa02-4658-97ba-cbd409ed102a.png?resizew=197)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614a1f5b3eb70653f1a4d495dd5dc9e4.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0987104aa1630a8f3d0b49730bc5bdd4.png)
(3)在y轴上是否存在点Q,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291aa1d5ff046f80c88daf1040da1701.png)
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【推荐2】如图,
和
都是等边三角形,点B在
的延长线上
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/3a66a64a-c519-41e2-9ac4-c29d2bdf591b.png?resizew=171)
(1)求证:
;
(2)若
,
,求
的长;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/3a66a64a-c519-41e2-9ac4-c29d2bdf591b.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0268d04b9dea7629af27af9a0285a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次