1 . 如图,正方形
的边长是4.E是
边上一点(E不与A、B重合),F是
的延长线上一点,
.四边形
是矩形,其面积
随
的长
的变化而变化且构成函数.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/efab2ff1-d70b-4958-89fa-5c46256cde8b.png?resizew=176)
(1)求
与
之间的函数关系式,并写出自变量
的取值范围;
(2)若上述(1)中是二次函数,请用配方法把它转化成
的形式,并指出当
取何值时,
取得最大(或最小)值,该值是多少?
(3)求出抛物线与
轴的交点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5774f580a6bb0cd5291cd8d14e2af648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a528a9e05c1097f568566ceac619ae9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/efab2ff1-d70b-4958-89fa-5c46256cde8b.png?resizew=176)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若上述(1)中是二次函数,请用配方法把它转化成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcff1114aa1a7d118ccbeec937a55c45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)求出抛物线与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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名校
2 . 在平面直角坐标系中,抛物线
经过点
,点P在抛物线上,横坐标为m,点P不与点A重合.
(1)求a值.
(2)设点D是抛物线的顶点,过点P作直线
轴交抛物线于点E,当
时,求m的值.
(3)将抛物线上P、A两点之间的部分(包括端点)记作图象G,当图象G的最高点与最低点在直线
的异侧时,求m的取值范围.
(4)设点
,在平面内构造面积最小的矩形,使该矩形的边均与坐标轴垂直且A,P,Q三点都在矩形的内部或边上,当抛物线在矩形内部的部分所对应的函数值y随x的增大而减小且
平分该矩形面积时,直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0373b9fdebaec5f322c410ec0639b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
(1)求a值.
(2)设点D是抛物线的顶点,过点P作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ad84a84ed0f550020f561dae537a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a761147e24fceee2c47c20b9acd057.png)
(3)将抛物线上P、A两点之间的部分(包括端点)记作图象G,当图象G的最高点与最低点在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c868c1edfe2e56d091eef8e8a83097.png)
(4)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efe3a0225b367f7c3b3edf8fdf752676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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2024-01-18更新
|
121次组卷
|
3卷引用:吉林省长春市朝阳区第二实验学校2023-2024学年九年级上学期1月月考数学试题
名校
3 . 某学校为美化学校环境,打造绿色校园,决定用篱笆围成一个一面靠墙(墙足够长)的矩形花园,用一道篱笆把花园分为A,B两块(如图所示),花园里种满牡丹和芍药,学校已定购篱笆 120 米.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/697faf51-1c54-4c6b-a685-d67276368ec8.png?resizew=183)
(1)设垂直墙的一边为x米,则平行墙的一边为__________米.
(2)要使花园面积最大,求此时x的值并求出其最大面积S.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/697faf51-1c54-4c6b-a685-d67276368ec8.png?resizew=183)
(1)设垂直墙的一边为x米,则平行墙的一边为__________米.
(2)要使花园面积最大,求此时x的值并求出其最大面积S.
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4 . 如图,抛物线
交
轴于A、
两点,交
轴于点
,点A坐标为
,以
为直径作
,
与抛物线交于
轴上同一点
,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/2d59fb36-28b4-4c6e-be06-372634408da1.png?resizew=191)
(1)求抛物线的解析式;
(2)点
是
延长线上一点,
的平分线
交
于点
,连接
,求直线
的解析式;
(3)在(2)的条件下,抛物线上是否存在点P,使得
?若存在,求出P点坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe1782f9b0297c4e9f0dd64166b83e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f22595d0a056a4ae78e132941e12989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f22595d0a056a4ae78e132941e12989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/2d59fb36-28b4-4c6e-be06-372634408da1.png?resizew=191)
(1)求抛物线的解析式;
(2)点
![](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/db866ecc0c098bfc32ec8a43b65bdd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f22595d0a056a4ae78e132941e12989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)在(2)的条件下,抛物线上是否存在点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd40dcb11adbdffa4b0d14d02d0a93a8.png)
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5 . 如图所示,一个农户要建一个矩形猪舍,猪舍的一边利用长为
的房墙,另外三边用
长的建筑材料围成,为了方便进出,在垂直于房墙的一边留一个
宽的门.
(1)所围成矩形猪舍平行于墙的一边长为多少时,猪舍面积为
?
(2)为做好猪舍的卫生防疫,现需要对围成的矩形进行硬底化,且已知硬底化的造价为50元/平方米,请你帮助农户计算矩形猪舍硬底化需要的最大费用.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e978c77cb0d7eff794447241e9829867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146ea9ed5176797da555a70bbe9602c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f328ba89c0a92a4447788b65571f7aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/2fc8b56d-87ef-499a-8b82-e8f19b70ee8a.png?resizew=172)
(1)所围成矩形猪舍平行于墙的一边长为多少时,猪舍面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a2ff3b4e327d32d7505fbb40d47669.png)
(2)为做好猪舍的卫生防疫,现需要对围成的矩形进行硬底化,且已知硬底化的造价为50元/平方米,请你帮助农户计算矩形猪舍硬底化需要的最大费用.
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6 . 如图,四边形
内接于
,
的半径为4,
为直径,
为弧
的中点,对角线
、
相交于点
,过点
分别作
于点
,
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/b8609888-7e09-404b-9bc0-7b761b3f70fa.png?resizew=137)
(1)求证:四边形
为正方形;
(2)若
,求正方形
的边长;
(3)设
的长为
,图中阴影部分的面积为
,求
与
之间的函数关系式,并写出
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d603566c74b1d5de510a2e8f7859010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544204617f1eb4e26a082a72d27d0bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/b8609888-7e09-404b-9bc0-7b761b3f70fa.png?resizew=137)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213a169e7fd26fcd32fb159bee2a3f91.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213a169e7fd26fcd32fb159bee2a3f91.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
7 . 如图,
是一块锐角三角形余料,边
,高
,要把它加工成一个矩形零件,使矩形的一边在
上,其余两个顶点分别在
、
上,设该矩形的长
,宽
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/88b0de2b-d50b-45b2-b502-ee7a404f416a.png?resizew=153)
(1)求证:
;
(2)当
与
分别取什么值时,矩形
的面积最大?最大面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf57eef2bac6f23b54d87bd128fac25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b268b2129e91d0af3423f2c001653d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ec121483c8f16c43eb3ad1abf2d775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8aa0bd0ca065a23d1a163351d3e5ce5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/88b0de2b-d50b-45b2-b502-ee7a404f416a.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/919988e034f718cb4ae070656e78a4d4.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
您最近一年使用:0次
2024-01-14更新
|
90次组卷
|
2卷引用:广西壮族自治区南宁市江南区金凯初级中学2023-2024学年九年级上学期12月月考数学试题
8 . 兴农农场准备利用如图所示的直角墙角(两边足够长),用
长的篱笆围成一个矩形家禽养殖场
(篱笆只围
,
两边),并在
,
两边上各开一个
宽的门,设
,养殖场的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/4f1a3a86-a6c3-40e7-a0d9-6adeb1bc33a6.png?resizew=168)
(1)求
关于
的函数表达式;
(2)求
的最大值;
(3)若在直角墙角内点
处有一水池,且与墙
,
的距离分别是
,
,要将这个水池围在矩形养殖场内(含边界,不考虑水池的尺寸),则养殖场的面积能否为
?若能,求出
的值;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8badcdb1e5621f0ac4d9272041185a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f328ba89c0a92a4447788b65571f7aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee18c1ab349ebab9ecd692a1dc07d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa2d65026770c5505f8adeb450e43b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/4f1a3a86-a6c3-40e7-a0d9-6adeb1bc33a6.png?resizew=168)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)若在直角墙角内点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167e6e41ac221847824a72e964f340f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c08094f72d5bd69246c453dd28e33d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e747a4f096e95d2e1d6a48ec5fbb13cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
9 . 如图,用一段长为
的篱笆围成一个一边靠墙的矩形菜园,墙长为
.设矩形菜园的边
的长为
,面积为
,其中
.
①x的取值范围为
;
②
的长有两个不同的值满足该矩形菜园的面积为
;
③矩形菜园
的面积的最大值为
.
其中,正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1611d15c7e1e4ab4a4a61537b3989d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2955b553ed5ead16f9f7470f57b08b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3bde6ef2ee5b749b4d48d706543cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa2d65026770c5505f8adeb450e43b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a98c968a7653c11f184a43851941c0.png)
①x的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3840a8190f6e44656e1a8342564dba.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b821fa11833325f33af8d1fd8bf6df59.png)
③矩形菜园
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a1c95dc69588e6842df40af57911952.png)
其中,正确结论的个数是( )
A.0 | B.1 | C.2 | D.3 |
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2024-01-13更新
|
449次组卷
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3卷引用:天津市静海区实验中学2023-2024学年九年级下学期月考数学试题
10 . 【问题提出】
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/137f9092-6f83-41ff-8fee-f556701c9907.png?resizew=419)
(1)如图1,在
中,
.请在
内画一个正方形,使得这个正方形一个内角为
,其余顶点落在
的边上;
【问题探究】
(2)如图2,
是锐角三角形,其中
,若要在
中做出一个平行四边形,使平行四边形一边
落在
上,另两顶点落在
上,请求出满足条件的平行四边形面积的最大值.
【问题解决】
(3)如图3,有一四边形
与
交于
,现要在四边形
中截出平行四边形
,使得平行四边形一边
与
平行,四个顶点
落在四边形
的四边上,当
时,求线段
的长度.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/137f9092-6f83-41ff-8fee-f556701c9907.png?resizew=419)
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
【问题探究】
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb31aced57fab505d1dd215fcb31400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
【问题解决】
(3)如图3,有一四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d94651fcfd4fe8d51fdcdc9ab8a215.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3d4815b230ab49048cf843dfaf62e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.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/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a343f11040d8a810edfebfbe324fa06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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