如图,
中,
,
垂直平分
,交
于点F,交
于点E,且
,连接
.
,求
的度数;
(2)若
的周长为
,
,求
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e792b0ef3d542237ed0903194597651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba0364b6dc914f33180821096aaa6ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9822e15763be5cb6c49936df274a6748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafddfd80f69337909f6eac0f0dbfd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
更新时间:2024-05-21 09:52:52
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,点P为△ABC内部一点,使得∠PBC=30°,∠PBA=6°,且∠PAB=∠PAC=24°,求∠APC的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/750390b6-b51b-46ee-afe5-40cef888100f.png?resizew=139)
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解答题-问答题
|
适中
(0.65)
【推荐2】在矩形
中,
E、F是直线
上的两个动点,分别从A,C同时出发相向而行,速度均为每秒1个单位长度,运动时间为t秒![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf8fc3f0f0cd7f86239f1d922697356.png)
中点,当
s时,四边形
是矩形.
(2)若在点E、F运动的同时,点G以每秒1个单位长度的速度从A出发,沿折线
运动,点H以每秒1个单位长度的速度从C出发,沿折线
运动.
①如图2,作
的垂直平分线交
于点P、Q,当四边形
的面积是矩形
面积的一半时,求t值;
②如图3,在异于G、H所在矩形边上取P、Q,使得
,顺次连接P、G、Q、H,则四边形
周长的最小值是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/407aa1eeb15821f8ec9418005b3cb0ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf8fc3f0f0cd7f86239f1d922697356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbbd6f7219deca374f79d30ceedf3b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a270ec7e23fc0cc1d4b04bf1d22184.png)
(2)若在点E、F运动的同时,点G以每秒1个单位长度的速度从A出发,沿折线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0cc6293cfedec30b124ece908c4c438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e582c41a5b79f98708e4f139ec0936d.png)
①如图2,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cacfcf5e6f1641c9891b43d1388bc54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
②如图3,在异于G、H所在矩形边上取P、Q,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c115c0bf8455d1feb058848aaee5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cacfcf5e6f1641c9891b43d1388bc54.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】在
中,
,在△ABC的外部作
,使得
,点D是直线
上的动点,过点D作直线
的垂线,垂足为E,交直线
于F.
(1)如图1所示,当点D与点B重合时,延长
交点N,证明:
;
(2)当点D在直线
上运动时,
和
是否始终保持上述数量关系呢?请你在图2中画出点D运动到
延长线上某一点时的图形,并证明此时
与
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40975f7553d8cfa57951b568bae9c464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e520cef3cebf757a24737ffb661834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e5c38f8d41e6b01ec610a2e5923423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(1)如图1所示,当点D与点B重合时,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01013dcebf57ba0c5854a9e0d992b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d371bb118cd25d90fe3f2df0196715b.png)
(2)当点D在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/95c142d9-5a7f-46f6-9bea-dbd60023497b.png?resizew=391)
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名校
【推荐2】如图,
是
的直径,
平分
,交
于点D,过点D作直线
,交
的延长线于点E,交
的延长线于点F.
是
的切线;
(2)过点O作
,交
于点H,连接
,若
,
,求
的半径长.
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)过点O作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/257d873513c1ba4a1cb78ad9df46667b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a12c5ba0d51bd636610cd812716cc9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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
中,
,点P从点A出发,沿折线
以每秒1个单位的速度向点B运动,当点P与点A、B、C不重合时,过点P作其所在直角边的垂线,交
边于点Q,以
为底边,作等腰
,使
,点P运动的时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/c616a14e-b0f6-486a-a275-58e018043da5.png?resizew=321)
(1)直接写出
的长.
(2)分别求出当
和
时,求线段
的长.
(3)在整个运动过程中,过点D作
于点H,用含t的代数式表示
.
(4)当
与
重叠部分的图形为三角形时,直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f81ba05fdbf0b4b2b9ba7df22d58c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f628380074f7b2f656e8ac56f15fa3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd3355d3bee7e168af3bec0662b7dd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fecfdc826358d057dd522388c8156965.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/c616a14e-b0f6-486a-a275-58e018043da5.png?resizew=321)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
(2)分别求出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66884efff7400f92b530d69d029778d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
(3)在整个运动过程中,过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd5b668af1b40b22d4dfd44eaff680c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3864197879d33d10f16a6429b0227c.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd3355d3bee7e168af3bec0662b7dd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图
平分
平分
和
交于点
为
的中点,连结
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/ec857874-ad14-49f7-b415-5f7cd4073517.png?resizew=205)
(1)找出图中所有的等腰三角形,并证明其中的一个;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ef3291a1c853bd7db9343bc4045fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f0b5fa2ba6394dabb0b03d5e0ab4b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ebcc5c0a70cc1a34eb70d0b578d688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/ec857874-ad14-49f7-b415-5f7cd4073517.png?resizew=205)
(1)找出图中所有的等腰三角形,并证明其中的一个;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209e0e7a619034f97c9fe7f7bc297069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次