如图,在四边形
中,对角线
与
相交于点
,记
的面积为
的面积为
.
(1)问题解决:如图①,若
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3682afa5e3e71971c82d35c98a6146.png)
(2)探索推广:如图②,若
与
不平行,(1)中的结论是否成立?若成立,请证明;若不成立,请说明理由.
(3)拓展应用:如图③,在
上取一点
,使
,过点
作
交
于点
,点
为
的中点,
交
于点
,且
,若
,求
值.
![](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/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cafcfda66985590445521b4e6e7e7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/2a697e04-d1c4-4e4d-8bea-7bacb81a014a.png?resizew=532)
(1)问题解决:如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3682afa5e3e71971c82d35c98a6146.png)
(2)探索推广:如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)拓展应用:如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb43a62f3bfd7666ab898bcb5efc1ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c41158715d94c6c9ffebdee957d2618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d51083cf65d74e2856c9755c1ebaa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcdd801e42025b59c2e09c4d993f9762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
更新时间:2023-08-01 09:14:52
|
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在△ABC中,∠B=∠C=60°,D,E,F分别为边BC,AB,AC上的点,且BE=CD,∠EDF=60°.求证:ED=DF.
![](https://img.xkw.com/dksih/QBM/2019/6/19/2228865014693888/2229505032691712/STEM/0539b04fe0d44b77b369ee27609cde74.png?resizew=128)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】如图,在△ABC中,∠ACB=90°,AC=BC.点D在边AB上,点B关于CD的对称点为E,BE交CD于点G.AE与CD的延长线交于点F,连接CE,BF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/9f4c3f69-e405-417d-9747-74add13a5ea9.png?resizew=175)
(1)求证:∠CAE=∠CEA;
(2)若BD<AD,求∠AFC的度数;
(3)若AD=BC,求证:EF=DF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/9f4c3f69-e405-417d-9747-74add13a5ea9.png?resizew=175)
(1)求证:∠CAE=∠CEA;
(2)若BD<AD,求∠AFC的度数;
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您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐1】如图,A点坐标为
,直线
经过点
和点
,交x轴于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/a45d248f-1c58-4589-bb7f-07da9da852f6.png?resizew=354)
(1)求直线
的函数表达式.
(2)在直线
的上找一点E(D点除外),使
,求E点坐标.
(3)在(2)的条件下,取
,作直线
与y轴交于点G,作直线
与直线
交于点P,与直线
交于点Q,连接
,若
,直接写出P点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0802a9abca983428be14669b76f1e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6adccf8bd7e72c5020f7aacfa2cf4241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caae2a8c278def767d5b8fcb8b4bb279.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/a45d248f-1c58-4589-bb7f-07da9da852f6.png?resizew=354)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
(3)在(2)的条件下,取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f859568c3b5a2d08f458f8648b213fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22a9b4f9028a072df8718a21dabf60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48024b45503485fdca2a6081f3cf30d.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】在
中,
,点
是
的中点,
是
延长线上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/6/f947c589-2440-4024-adb0-7ba0d22d2a15.png?resizew=305)
(1)如图1,若
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的长;
(2)如图2,点
是
的中点,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/6/f947c589-2440-4024-adb0-7ba0d22d2a15.png?resizew=305)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a06eb7729f19f9cf36ca2faaf75d3317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8011db2088272784a4671d85702e804.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
名校
【推荐1】如图,点
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为直径的半圆上运动(不与
重合),
于
点,过
点作
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平行交
的延长线于
点.
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(1)求
的度数;
(2)求证:
与
相切;
(3)若
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的值.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/ce42ac09-6ee2-443b-b700-ff33a4fd744d.png?resizew=162)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958e7abd79a73e20a4629233d7b42e4a.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f87b9fbad17f21b2a73fd756190e95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61768e7b76d0b4fc18bf738b1ea6fe8.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,在矩形
中,点
是
的中点,连接
,过点
作
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于点
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.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/126f570f-6037-419d-82e3-8d9142404b5c.png?resizew=174)
(1)求证:
;
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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(1)求证:
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(2)若
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您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,方格纸中的每个小方格都是边长为1个单位的正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/7bbf0d34-adee-4b21-9f7e-a3ed1c0461f2.png?resizew=217)
(1)画出以
为直角边的
,点C在方格纸上的格点上,
;
(2)在(1)的条件下,线段
绕点C顺时针旋转
,得到线段
(点A与点D为对应点),点D在方格纸上的格点上,连接
,直接写出四边形
的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/7bbf0d34-adee-4b21-9f7e-a3ed1c0461f2.png?resizew=217)
(1)画出以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583effa35880ba5704dfc4ae4e48a6fa.png)
(2)在(1)的条件下,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](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2】(1)已知:对于锐角α满足
,求tan15°的值;
(2)如图,△ABC中,∠C=90°,∠BAC=30°,延长CA到D,使AD=AB,连接BD,请利用这个图形求tan15°的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbd299293ea948da9d68a27f8e5841e.png)
(2)如图,△ABC中,∠C=90°,∠BAC=30°,延长CA到D,使AD=AB,连接BD,请利用这个图形求tan15°的值.
![](https://img.xkw.com/dksih/QBM/2022/9/2/3057656123310080/3069775847391232/STEM/6072c104f83c4048aacb1ee162c29478.png?resizew=206)
您最近一年使用:0次