如图,在
中,
,
,点
为
内一点,且
.
![](https://img.xkw.com/dksih/QBM/2020/8/17/2530014474354688/2530431493234688/STEM/fefdc8e0-2177-434f-a390-07381095eb03.png)
(1)求证:
;
(2)若
,
为
延长线上的一点,且
.
①求
的度数.
②若点
在
上,且
,请判断
、
的数量关系,并说明理由.
③若点
为直线
上一点,且
为等腰
,直接写出
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a1d4c140243ba9a9bd7256ec2bbce6.png)
![](https://img.xkw.com/dksih/QBM/2020/8/17/2530014474354688/2530431493234688/STEM/fefdc8e0-2177-434f-a390-07381095eb03.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615423de8cae2a76d73625352c46dbfe.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/e03ca3e334c5290ab28b4b4a883c90c8.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a386524e1e2a7bc2754052f780cd275a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
③若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b417f46d390b5cac02e1c20f88fdf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6595597d25112f247753397d25bf5080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a13b7c0e1c488447dfa0b234991e31.png)
更新时间:2020-08-18 12:38:57
|
相似题推荐
解答题-问答题
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【推荐1】对于平面直角坐标系
中的点P和图形M,给出如下定义:将图形M绕P顺时针旋转
得到图形N,当图形M与图形N有公共点时,我们称点P是图形M的“关联点”.已知
,
.
的“关联点”,在点
,
,
中,则满足条件的点是__________;
(2)若直线
上存在点P,使点P为线段
的“关联点”,直接写出b的取值范围;
(3)以
为圆心,1为半径的
,若线段
上存在点P,使点P为
的“关联点”,直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaf13627819890607661d8eb55efa83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f3aec1dc12dc085258842c804e597b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42795469ed8ba12729fcebd710e8795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f1b10c76be8f49c88efa7ae37c77ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66953e2c52732fca1af921aef43bc0fa.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9bd144e0e96e4236a14523e0729cacb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
(3)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffb06e9495161690484b259410698660.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
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【推荐2】综合与实践
综合实践课上,老师让同学们提出下面数学问题并解答:
问题情境:
中,
,
,
于点D,点M为直线
上一点,过点M作
,垂足为点E,
交
于点F.试探究
与
的数量关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/9a976fb2-143c-4300-a2e1-e3689275887d.png?resizew=422)
数学思考:
(1)“兴趣小组”发现,如图1,当点M与点A重合时,
,并给出如下证明过程:
∵
于点D,
∴
,
∴
,
∵
,
∴
,
∴
,
∵在
中,
,
,
∴
,
∴
,
∴
,(依据1)
∴
,
∵
中,
,
,
∴
,(依据2),
∴
,即
;
上述证明过程中,“依据1”,“依据2”分别指的是:
依据1:___________________;
依据2:___________________.
类比探究
(2)“智慧小组”认为:如图2,当点M是边
上一点时(与A,C不重合),“兴趣小组”发现的结论仍然成立,请你证明.
拓展延伸
(3)请你思考:如图3,当点M是
延长线一点时,“兴趣小组”发现的结论是否成立?若成立,请在图3中作出辅助线,不必证明;若不成立,说明理由.
综合实践课上,老师让同学们提出下面数学问题并解答:
问题情境:
![](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/3f81e24376a13d648c2ed0dc73bc710e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc0e7a1541a8db0c059fd6cd0c4c3620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/9a976fb2-143c-4300-a2e1-e3689275887d.png?resizew=422)
数学思考:
(1)“兴趣小组”发现,如图1,当点M与点A重合时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259a4f8c4883a2855b1b6fcf568e607e.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ca74bf9a94cacd6fad637a5c1fbc97.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a62e0fb70f93e9af7f67bbd626b0a36.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/078ab5e8828f85e2acc293ff1c7a48bf.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9023e0924499dc4aad8cb58c25b5cfe.png)
∵在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ed407cbb778f76bf879bfcae69ebba.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1bb56f3601b50ddc65c4f7effb81b83.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0131d0fa3438187244cec67193aa2ab1.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e06580cb62c6ea370ad9fb150b7328a9.png)
∵
![](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/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f642181182fe187cdd2944afef94fa3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d636f59faeeccd0a6472babfa1a519d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259a4f8c4883a2855b1b6fcf568e607e.png)
上述证明过程中,“依据1”,“依据2”分别指的是:
依据1:___________________;
依据2:___________________.
类比探究
(2)“智慧小组”认为:如图2,当点M是边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
拓展延伸
(3)请你思考:如图3,当点M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
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【推荐1】如图,已知抛物线
(
)与
轴相交于点
,与
轴分别交于点
和点A,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/0179c67f-f3e8-4e71-811a-6bfb8c40853f.png?resizew=321)
(1)求抛物线解析式;
(2)抛物线上是否存在一点
,使得
,若存在,请求出点
坐标,若不存在,请说明理由;
(3)抛物线的对称轴交
轴于点
,在
轴上是否存在一个点
,使
的值最小,若存在,请求出最小值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff6b7670302e7015123b9446afab1f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb3ebb69a2f72787c3630de388dd5b6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/0179c67f-f3e8-4e71-811a-6bfb8c40853f.png?resizew=321)
(1)求抛物线解析式;
(2)抛物线上是否存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036ad1f04d5a325730f2c303db86de88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(3)抛物线的对称轴交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f578f8794f8dac71328f5896219919e3.png)
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【推荐2】综合与实践
【观察猜想】(1)如图1,
与
都是等腰直角三角形,其中
,
,
,点
在线段
上,连接
,
,则
和
的数量关系是______.
【探索证明】(2)如图2,将(1)中的
绕点
顺时针旋转,点
落在线段
上,其他条件不变,此时
的度数是______,探究线段
,
,
之间的数量关系,并说明理由.
【拓展探究】(3)如图3,
是等腰直角三角形,其中
,
,
为
外一点,且
,连接
,若
,
,请直接写出
的长.
【观察猜想】(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ead706ccc238d868654030a3626847c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
【探索证明】(2)如图2,将(1)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
【拓展探究】(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22b02f6c8636152aeb62d191251e931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19faa41278c9f5013f17b201a75db964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/ec2b3ab6-c229-4eeb-89c9-c6f29f2e6964.png?resizew=406)
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【推荐1】
是等边三角形,点
、
分别在
、
上,且
,连接
、
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/fe8a6dfc-0572-4963-a22c-3b2d232d5f66.png?resizew=500)
(1)如图1,求
的度数;
(2)如图2,以
为边作等边
,连接
,求证:
;
(3)如图3,在(2)的条件下,延长
、
交于点
,点
在线段
上,且
,连接
交
于点
,若
,
,直接写出
的值.(提示:可过点
作
交
于点
,过点
作
于点
,作
于点
.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26b33f5b71039c35ac5e93795e254f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/fe8a6dfc-0572-4963-a22c-3b2d232d5f66.png?resizew=500)
(1)如图1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5071953255f6434eaefeab7176372564.png)
(2)如图2,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7ad41b36674fd6e90176ee24cdefbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86508f8e9a049731f2ba129dcdde4794.png)
(3)如图3,在(2)的条件下,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9303e102d9d901f60ad48b9e6023b76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308c1ab296fb59e6f360afaea80803dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a62d20003c14d2e0646a38d18e07ecd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61768e7b76d0b4fc18bf738b1ea6fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98b9f6e7d66572ccba19a7eca10ba82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f21eb2df06c6ca7019788ca9cbb8cb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87283d8d0f15a01f72474652c926d79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】问题提出:
中,
,
,以
为边在
外作等边
,过点
作
于
,连接
,求
的值;
问题解决:
(2)2024年国际沙滩排球世界锦标赛将在陕西商洛举行,为迎接此次锦标赛,促进全民健身,计划修建一个四边形运动公园如图②所示.运动公园(即四边形
)需建在公路
的一边,现场测量
,根据有关设计要求:运动公园还要满足
,
,且
,那么是否存在面积最大的运动公园?若存在,请求出运动公园面积的最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ebbb89ac9ec9860a8a3235c89a6182.png)
问题解决:
(2)2024年国际沙滩排球世界锦标赛将在陕西商洛举行,为迎接此次锦标赛,促进全民健身,计划修建一个四边形运动公园如图②所示.运动公园(即四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6d3e38a109773043103d0fcb721f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf10b7ba450efe5cedb72781eb1edac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cfd06965af6014208127f2880b476b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
您最近一年使用:0次