如图
,在
中,点
,
分别是
和
上的点,满足
,连接
并延长交
延长线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/307f7e62-85e5-44b1-82d5-e9b47d539a34.png?resizew=438)
(1)若
求证:
;
(2)如图
,过
作
,垂足为
.
①求证:
;
②如图
,连接
,若
,
,
的面积为
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3767efa8adfb71001ad39df9560cbf6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/307f7e62-85e5-44b1-82d5-e9b47d539a34.png?resizew=438)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abbd8293af38d95cacdf64b1599710a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c9bff988abfbb5445c477e3f4a07ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0bd538d40ec7e85bf65355736e1779.png)
②如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbac3ce16414bd805f688b3c73a92410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8e8b8dc232a88228f377b7782db172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d11746005a0e806f2d27f89e3d9e9c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36691f0269294ecae8f00b7bce97756c.png)
更新时间:2024-01-04 12:38:54
|
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解答题-证明题
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适中
(0.65)
【推荐1】如图1,若△ABC和△ADE为等腰直角三角形,AB=AC,AD=AE,M,N分别EB,CD的中点.
![](https://img.xkw.com/dksih/QBM/2014/2/12/1573704474869760/1573704481153024/STEM/e7ad5dd5-51ad-41f1-9a1d-3deec5ac3c21.png)
(1)易证:①CD="BE" ;②△AMN是 三角形;
(2)当把△ADE绕A点旋转到图2的位置时,
![](https://img.xkw.com/dksih/QBM/2014/2/12/1573704474869760/1573704481153024/STEM/266c0af5-667a-492e-8427-f9d2bd779724.png)
①求证:CD=BE;
②判断△AMN的形状,并证明你的结论;
(3)当△ADE绕A点旋转到图3的位置时,(2)中的结论是否成立?直接写出即可,不要求证明;并求出当AB=2AD时,△ADE与△ABC及△AMN的面积之比.
![](https://img.xkw.com/dksih/QBM/2014/2/12/1573704474869760/1573704481153024/STEM/e7ad5dd5-51ad-41f1-9a1d-3deec5ac3c21.png)
(1)易证:①CD="BE" ;②△AMN是 三角形;
(2)当把△ADE绕A点旋转到图2的位置时,
![](https://img.xkw.com/dksih/QBM/2014/2/12/1573704474869760/1573704481153024/STEM/266c0af5-667a-492e-8427-f9d2bd779724.png)
①求证:CD=BE;
②判断△AMN的形状,并证明你的结论;
(3)当△ADE绕A点旋转到图3的位置时,(2)中的结论是否成立?直接写出即可,不要求证明;并求出当AB=2AD时,△ADE与△ABC及△AMN的面积之比.
![](https://img.xkw.com/dksih/QBM/2014/2/12/1573704474869760/1573704481153024/STEM/fec51618-7190-4b8a-86df-0571ed1fd8b2.png)
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【推荐2】如图,已知△ABC中,AB=3,AC=5,∠BAE=∠CAE,BE⊥AE于点E,BE的延长线交AC于点D,F是BC的中点,求EF的长.
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解答题-作图题
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名校
【推荐1】如图,四边形
是平行四边形,点E在
上,请仅用无刻度直尺按要求作图(保留作图痕迹,不写作法)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)在图2中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3620030e8808da46df97330103827913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,
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,
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,若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-问答题
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适中
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【推荐1】如图,
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上一点,过点C的切线和
的延长线交于点D,连接
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![](https://img.xkw.com/dksih/QBM/2023/2/15/3175395133161472/3190360800206848/STEM/edeba29b66ac4daf985b753bee99c03c.png?resizew=160)
(1)若
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的度数;
(2)在(1)的条件下,若
,求图中阴影部分的面积.
![](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/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e1e2a60c37ebc303d4fc2bf3d6a234.png)
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【推荐2】如图在△ABC中,AD为BC边上的中线,E是线段AD上一点,且AE=
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