已知等腰三角形底边长为
,底边上的高的长为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/d38afe29-d5d4-4d70-8429-717429f73c95.png?resizew=134)
(1)请用直尺、圆规作出等腰三角形,简要写出作法,保留作图痕迹;
(2)当
与
满足什么数量关系时,这个等腰三角形的底角是
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/d38afe29-d5d4-4d70-8429-717429f73c95.png?resizew=134)
(1)请用直尺、圆规作出等腰三角形,简要写出作法,保留作图痕迹;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b342d5cb6dd1c84a82f6aca68ed829c.png)
更新时间:2023-12-10 08:12:59
|
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,方格纸中每个小正方形的边长均为1,线段AB的两个端点均在小正方形的顶点上.
在图中画出以AB为一条直角边的等腰直角
,且点C在小正方形的顶点上;
在图中画出以AB为一边的菱形ABDE,且点D和点E均在小正方形的顶点上,菱形ABDE的面积为15,连接CE,请直接写出线段CE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
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解答题-作图题
|
适中
(0.65)
【推荐2】如图,在平行四边形
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/11/eaa8dc48-6216-42bf-bb7e-3c51dc0102e4.png?resizew=228)
(1)若点
是
边上的一点,且
,请用直尺和圆规作出符合条件的点
(保留作图痕迹,不写作法);
(2)在(1)的条件下,试求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/11/eaa8dc48-6216-42bf-bb7e-3c51dc0102e4.png?resizew=228)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82414a1ef5a8d9413a0f5a499191dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)在(1)的条件下,试求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图,
是
的直径,
是
的一条弦,且
于点
,连接
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/3/30/2430835843612672/2430894813257728/STEM/586cb585edfa486db3e49ab602c8fc6e.png?resizew=113)
(1)当
时,求
的度数;
(2)若
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/730d152087371036b9069a1f46e9dff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5713d1a64003579a8daec80c5a55b939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,OA.OB是⊙O的半径且OA⊥OB,作OA的垂直平分线交⊙O于点C.D,连接CB.AB.
求证:∠ABC=2∠CBO.
求证:∠ABC=2∠CBO.
![](https://img.xkw.com/dksih/QBM/2015/8/27/1573901549502464/1573901555499008/STEM/b2de645a2e334d35b2c0e6f74361af56.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图,在平面直角坐标系中,O是坐标原点,在
中,
于点C,点A在反比例函数
的图象上.
,则
_______;
(2)若
,求反比例函数的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81872e5d20f10bb33b794e4abb7433f1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b369eb031bad872b0d3a9cf746119f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143a28de7941be5a238cf763096b42f9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b4a16e33ee6d9bbace17928a0a9072.png)
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解答题-作图题
|
适中
(0.65)
【推荐2】小明发现,任意一个直角三角形都可以分割成两个等腰三角形,已知:在
中,
.求作:直线
,使得直线
将
分割成两个等腰三角形。下面是小明设计的尺规作图过程.
作法:如图,①作直角边
的垂直平分线
,与斜边
相交于点D;②作直线
,则直线
就是所求作的直线.
根据小明设计的尺规作图过程,解决下列问题:
(1)使用直尺和圆规,补全图形(保留作图痕迹);
(2)小明进一步探究:以点D为圆心,适当长为半径画弧分别交
于P、Q两点,再分别以点P、Q为圆心,大于
的长为半径画弧,两弧在
内交于点M,直线
交
于点E,则
( )(填写理由),使用尺规作图在图中补全作图痕迹.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
作法:如图,①作直角边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/31/53310c76-d66c-4c55-a42a-a0791dff4cf4.png?resizew=228)
根据小明设计的尺规作图过程,解决下列问题:
(1)使用直尺和圆规,补全图形(保留作图痕迹);
(2)小明进一步探究:以点D为圆心,适当长为半径画弧分别交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c24127d3e9da4b4a2547aa8de84ea45.png)
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