已知,如图,
是四边形
的外接圆,
;
(1)如图1,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
(2)如图2,连接
,过点A作
的切线交
的延长线于点E,
求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
(3)如图3,在(2)的条件下,连接
并延长,交
于点F,若
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/a8d64e9d-acb0-4a95-88ef-7fbfa4187c6f.png?resizew=547)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684d328b02462aa25a936d1c83eee4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
(3)如图3,在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a9463092d62989b027a3d5f0c8e1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
更新时间:2024-03-05 11:37:45
|
相似题推荐
解答题-作图题
|
较难
(0.4)
名校
【推荐1】【学习心得】
(1)小雯同学在学习完“圆”这一章内容后,感觉到一些几何问题如果添加辅助圆,运用圆的知识解决,可以使问题变得非常容易.
例如:如图1,在
中,
,
,D是
外一点,且
,求
的度数.若以点A为圆心,
长为半径作辅助圆
,则C,D两点必在
上,
是
的圆心角,
是
的圆周角,则
______
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/791fb375-b12e-4698-b2c0-46ea37bbb9cb.png?resizew=256)
【初步运用】
(2)如图2,在四边形
中,
,
,求
的度数;
【方法迁移】
(3)如图3,已知线段
和直线l,用直尺和圆规在l上作出所有的点P,使得
(不写作法,保留作图痕迹);
【问题拓展】
(4)如图4,已知矩形
,
,
,M为边
上的点.若满足
的点M恰好有两个,则m的取值范围为______.
(1)小雯同学在学习完“圆”这一章内容后,感觉到一些几何问题如果添加辅助圆,运用圆的知识解决,可以使问题变得非常容易.
例如: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/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b5c0e0724cce5c25a88dca5e9220c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/791fb375-b12e-4698-b2c0-46ea37bbb9cb.png?resizew=256)
【初步运用】
(2)如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b6e08fde74010412a6f14ad4dfbcc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3efd5327b552638062f226ced0d0028e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/2307fbde-4ea7-49e2-9ee0-d1786e060932.png?resizew=126)
【方法迁移】
(3)如图3,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5479a3dc9e022f1c6aab7086852ab59.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/928512c7-951f-4de3-b6d2-3f5fcf7da840.png?resizew=110)
【问题拓展】
(4)如图4,已知矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0c26071fa1ebab92b8e750fd50d828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb8fc1c1ff0b33616a96f25e7e79f50.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/671cd233-38dd-4980-bb1b-d1ea7a3198b4.png?resizew=109)
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解答题-作图题
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名校
解题方法
【推荐2】【学习心得】
小雯同学在学习完“圆”这一章内容后,感觉到一些几何问题如果添加辅助圆,运用圆的知识解决,可以使问题变得非常容易.
例如:如图,在
中,
,
,D是
外一点,且
,求
的度数.若以点A为圆心,AB长为半径作辅助圆
,则C,D两点必在
上,
是
的圆心角,
是
的圆周角,则
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/c4a5fe2c-a769-4e5b-b921-3f56379ab1e9.png?resizew=424)
(1)【初步运用】如图,在四边形
中,
,
,求
的度数;
(2)【方法迁移】如图,已知线段
和直线
,用直尺和圆规在
上作出所有的点
,使得
(不写作法,保留作图痕迹);
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/238aebe8-0229-47e0-95a6-94a411f07881.png?resizew=144)
(3)【问题拓展】
①如图,已知矩形
,
,
,
为
上的点.若满足
的点
恰好有两个,则
的取值范围为______.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/b350b4b0-2f70-4f6d-b87d-01a528a6fb2b.png?resizew=124)
②如图,在
中,
,
是
边上的高,且
,
,求
的长.
小雯同学在学习完“圆”这一章内容后,感觉到一些几何问题如果添加辅助圆,运用圆的知识解决,可以使问题变得非常容易.
例如:如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5489aaa6dc00789fcf126bf2fd744a02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/c4a5fe2c-a769-4e5b-b921-3f56379ab1e9.png?resizew=424)
(1)【初步运用】如图,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b6e08fde74010412a6f14ad4dfbcc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3efd5327b552638062f226ced0d0028e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)【方法迁移】如图,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5479a3dc9e022f1c6aab7086852ab59.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/238aebe8-0229-47e0-95a6-94a411f07881.png?resizew=144)
(3)【问题拓展】
①如图,已知矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0c26071fa1ebab92b8e750fd50d828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb8fc1c1ff0b33616a96f25e7e79f50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/b350b4b0-2f70-4f6d-b87d-01a528a6fb2b.png?resizew=124)
②如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81e24376a13d648c2ed0dc73bc710e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/e237aed2-64e4-4b3a-9a7c-0b6e59f270ab.png?resizew=96)
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【推荐1】阅读与思考
请阅读下列材料,并完成相应的任务.
任务:
(1)补全证明过程,
(2)如图3,在
中,
,
,若
,
,
,则
到
的距离是____________,
到
的距离是____________,
的半径是____________.
请阅读下列材料,并完成相应的任务.
在《阿基米德全集》中记述了伟大的古希腊数学家、哲学家、物理学家阿基米德提出的关于圆的一些问题,其中有这样一个问题:如图1,![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() 证明:如图2,在 ![]() ![]() ![]() ![]() ![]() ![]() ∵ ![]() ![]() ∴ ![]() ∵ ![]() ∴ ![]() ∴ ![]() …… |
(1)补全证明过程,
(2)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a313a8a3cc7d4bf0b56a76697a51ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab2ccc075e9eb14adcaad5feaf69896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/8c32e5c8-8b38-4961-a93a-e64aba8f3cfd.png?resizew=153)
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【推荐2】如图,在
中,点C是
上的一点,作
交
于点D,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/e81c199b-c414-47c9-a180-77011abe2cab.png?resizew=151)
(1)求证:
;
(2)连接
并延长
交
于点E,交弦
于点F,连接
交
于点G,连接
、
,请根据题意画图.已知
,
.
①若
,求
的长度;
②若点C从点A沿
运动点B时,求线段
的长度最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/e81c199b-c414-47c9-a180-77011abe2cab.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de966c316db1013defc56372fcf814e.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3032820a0d2d50d9143e7923f5936ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7bae5203f4b4acf23779114b3466e17.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69cdcc23f6c80941e4c4f9ee30a26749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
②若点C从点A沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
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【推荐1】【判断】如图1,连接
,
______
.(
,
,
)
【问题解决】
如图2,在平面直角坐标系中,
,
,直线
:
,连接
,
,求
的最大值;
【拓展应用】
学校计划组织学生春游,一条北偏东
走向的路上经过紫色大厦时,小明发现在观察紫色大厦时的最大视角为
,可以通过将公路和建筑物放在如图所示的平面直角坐标系中,可以计算出此时公路距离紫色大厦的最近距离
的长度,请你协助小明完成计算,直接写出答案.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
【问题解决】
如图2,在平面直角坐标系中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3452c21d4d7e74a9eb8bc0f97f5d4835.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aaf8e2eb7135c39715156ea5d10887c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f66ee1e9ad54b1d696cb4465135fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
【拓展应用】
学校计划组织学生春游,一条北偏东
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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解答题-问答题
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较难
(0.4)
【推荐2】已知:如图,∠C=90°,内切圆O分别与BC、AC相切于点D、 E, 判断四边形ODCE的形状,并说明理由.
![](https://img.xkw.com/dksih/QBM/2017/10/14/1794990293655552/1797176374763521/STEM/126c5cb14f2c413ea14ccb712fda5d5b.png?resizew=170)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】如图,在等腰直角
中,
,
,
为
边上一点,连接
,
于
点.
交
的延长线于点
若
,
,求
的长度;
(2)如图2,将
绕
点逆时针旋转
到
,连接
交
于点
,猜想
和
之间存在的数量关系,并证明你的猜想;
(3)如图3,在第(2)问的条件下,将
沿着
翻折得到
,连接
,当线段
取得最大值,请直接写出的
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/e4611ceb2a28f7a7e4d24266d7f99b22.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faffe3765c15f53305516895aa595a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
(3)如图3,在第(2)问的条件下,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370abdf35cb8817d35b78eea892731ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee76939033de9dd711caff1895c70af.png)
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解答题-计算题
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较难
(0.4)
【推荐2】如图1,在锐角△ABC中,AB=5,AC=4
,∠ACB=45°
(1)计算:求BC的长;
(2)操作:将图1中的△ABC绕点B按逆时针方向旋转,得到△A1BC1.如图2,当点C1在线段CA的延长线上时.
①求∠CC1A1的度数;
②求四边形A1BCC1的面积;
(3)探究:如图3,点E为线段AB中点,点P是线段AC上的动点,在△ABC绕点B按逆时针方向旋转所得到的△A1BC1中,点P的对应点是点P1,求线段EP1长度的最大值与最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(1)计算:求BC的长;
(2)操作:将图1中的△ABC绕点B按逆时针方向旋转,得到△A1BC1.如图2,当点C1在线段CA的延长线上时.
①求∠CC1A1的度数;
②求四边形A1BCC1的面积;
(3)探究:如图3,点E为线段AB中点,点P是线段AC上的动点,在△ABC绕点B按逆时针方向旋转所得到的△A1BC1中,点P的对应点是点P1,求线段EP1长度的最大值与最小值.
![](https://img.xkw.com/dksih/QBM/2019/12/31/2366780529598464/2367778309292032/STEM/571f5a7013d44e919d16c22690f0f4ff.png?resizew=495)
您最近一年使用:0次