问题提出
(1)如图1,已知点
为线段
上一动点,分别过点
作
,
,连接
. 若
,
,
,则
的最小值为 ;
问题解决
(2)如图2,某公园规划修建一块形如四边形
的牡丹园,其中
,
,
,
,
,
的内心
处修建一个圆形喷水池,公园的入口
是
的中点,
是一条观赏小道,其余部分种植牡丹,现需要在
边上取点
,
上找点
,修建道路
为了节省成本,需要使修建的道路最短,即
的值最小,是否存在这样的点
,使得
的值最小? 若存在,请求出其最小值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/19/9bd8e23a-d34f-4e4d-b6fc-72f1436123d4.png?resizew=424)
(1)如图1,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757942f619e1f8d5296438829fb11b34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8915e8e775538d41debf1933102c6b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5daa413c5a1b941452121c5d750a03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e46a7f185146052971adaeb14b3694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18444ec3e5e3b8a0cf488732c34866d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7225d7b261d697f92c76119bc2bd8c0d.png)
问题解决
(2)如图2,某公园规划修建一块形如四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e81e88dbb23b243ce28429ce9e2353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6483ebae422a8aa8110f65cd61eb7b0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54249b32f5db8aab778f03b5774e652f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6a87e27527e02b002e08b53ca27de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54249b32f5db8aab778f03b5774e652f.png)
更新时间:2023-06-14 17:15:04
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,平面上有四个点A、B、C、D.
(1)作线段
;
(2)作射线
;
(3)作直线
;
(4)若将B、D看作河
两侧的两个村庄,现要在河
上修建一个抽水站M,使它到B、D两个村庄的距离的和最小,请画出点M的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/6ff0dabe-836a-4e69-9ceb-f1e600a67543.png?resizew=136)
(1)作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(4)若将B、D看作河
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解答题-作图题
|
适中
(0.65)
名校
【推荐2】如图,已知平面上四个点
,请按要求画图并回答问题.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/9d6901ba-d6d8-4ceb-ba7c-1d0981197d51.png?resizew=125)
(1)连接
,延长
到
,使
;
(2)分别画直线
、射线
;
(3)在射线
上找点
,使
最小.此画图的依据是_______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd75b9df530421da9342348f2191105.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/9d6901ba-d6d8-4ceb-ba7c-1d0981197d51.png?resizew=125)
(1)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e92f48e9bfe12d145f7d2a2f0360d0.png)
(2)分别画直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3212a1eb1757ac956b40e5fc6e8005.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,
,
、
是
内两点,
平分
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/3/2d943969-0633-4fad-a473-9cc358200010.png?resizew=126)
(1)求
的度数;
(2)若
,求
的长.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/9aa14c146ac76fd05558c089cb12f787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/3/2d943969-0633-4fad-a473-9cc358200010.png?resizew=126)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图所示,将矩形纸片
沿
折叠,点
落在点
的位置,点
恰好落在边
上的点
处,连接
、
.
(1)求证:四边形
为菱形;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/6/03ec1f05-d151-46a0-b126-b48351fca895.png?resizew=151)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920ae90193d50ae60beafae6f2b4ebcd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddcf824fcf7aa9211980142acc3cb226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4836945f324c29ef818b423bcc017a93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】某数学兴趣小组在数学课外活动中,对多边形内两条互相垂直的线段做了如下探究:
中,
,
分别是
、
上两点,连接
,
,若
,求证:
.
(2)如图2,在矩形
中,过点
作
交
于点
,若
,求
的值.
(3)如图3,在四边形
中,
,
为
上一点,连接
,过点C作
的垂线交
的延长线于点
,交
的延长线于
,且
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f87b02b744534ae1ed700d21fcceb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d4a94e65672e52bac3e6c927b0a66d1.png)
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45b04cc3e5adaeff6f9e01e29032803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968f5fd009e1d4c430529e24f8c92b47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8775dcf60ad143bc59a58b000f374c56.png)
(3)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41aba1711910c6f533cc94319104f4fd.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5aa8272ce6c48ea254acaa1d2abd767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-证明题
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适中
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【推荐2】如图,AB是⊙O的直径,点C,D在⊙O上,BD平分∠ABC,过点D作DE⊥BC,交BC的延长线于点E.
(1)求证:DE是⊙O的切线;
(2)若CE=2,DE=5,求⊙O的半径.
(1)求证:DE是⊙O的切线;
(2)若CE=2,DE=5,求⊙O的半径.
![](https://img.xkw.com/dksih/QBM/2022/1/2/2885575005380608/2886312618106880/STEM/f3db1c81-33a8-45a7-acbb-7f4ec0c0c304.png?resizew=135)
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名校
【推荐3】今年10月“愉悦创造营”的同学们积极参加劳动实践,在校园“耕读园”里播种了近百粒萝卜种子.某周日下午返校时涵涵和静静约好一起去“耕读园”看看萝卜的生长情况.如图,已知“耕读园”在点A处,涵涵家位于点A正南方一条东西走向的街道
上,且在耕读园西南方向800米的C处;静静家位于点D正北方
米且位于“耕读园”南偏西
方向上的点E处,图中点A、B、C、D、E在同一平面内,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/6db6bc1c-c3c3-44f1-bd3f-fc2bf467948f.png?resizew=148)
(1)求静静家离耕读园的距离是多少?(结果保留根号)
(2)涵涵周日下午
出门,先以80米/分钟的速度从C出发,往正西方向走到点D处后再向正北方向到静静家楼下两人碰面,然后两人以此速度一起前往“耕读园”,请问她们能在
前到达耕读园吗?(参考数据:
,
,结果精确到十分位)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78be6be96b75f08d52dc7752afa650df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/6db6bc1c-c3c3-44f1-bd3f-fc2bf467948f.png?resizew=148)
(1)求静静家离耕读园的距离是多少?(结果保留根号)
(2)涵涵周日下午
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0a0126c1065bf9972b839b9c98cc28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26327e3c8697c8521bae835dc5d1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52881be613aa404e553da30d8987cfad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dad09268b7cb8bfcbea010cb6d2a29e.png)
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解答题-问答题
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名校
【推荐1】如图,大渡口义渡古镇某建筑物楼顶立有广告牌
,小玲准备利用所学的三角函数知识估测该建筑的高度.由于场地有限,不便测量,所以小玲从点B处沿坡度为
的斜坡步行25米到达点C处,测得广告牌底部D的仰角为
,广告牌顶部E的仰角为
(小玲的身高忽略不计),已知广告牌
米.(参考数据:
,
,
)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/3262f02f-59f2-4ced-bbca-a6c2df56cc4b.png?resizew=122)
(1)求C处距离水平地面的高度;
(2)求建筑物
的高度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6bd21e21aa61426fbf90367f86e0f0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903c1bb6f9fe8f9b9710683a3e601452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765922855c551e266992f66b762a86f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d2082b0e4e457c2ea1e033d69d8b39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b15906c24c41d13588f3c4b5e19086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476738939000cc9e73bc8035fbdd8676.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/3262f02f-59f2-4ced-bbca-a6c2df56cc4b.png?resizew=122)
(1)求C处距离水平地面的高度;
(2)求建筑物
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,已知抛物线
与x轴负半轴交于点A,与x轴正半轴交于点B,与y轴交于点C,点P抛物线上一动点(P与C不重合).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/1384ea25-55b3-40cb-b213-4e3814940a0c.png?resizew=156)
(1)求点A、C的坐标;
(2)当
时,抛物线上是否存在点P(C点除外)使
?若存在,请求出点P的坐标,若不存在,请说明理由;
(3)当
时,过点P作
轴于点Q,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d906511b131ed199e02de1f68e201937.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/1384ea25-55b3-40cb-b213-4e3814940a0c.png?resizew=156)
(1)求点A、C的坐标;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef98fdbaa33fc752c802e833f8b08a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd319bf11f943d97c4e2db8677dd4bbc.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eac21b9760772dbb7426e5b27c2f218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
您最近一年使用:0次