如图,在直角坐标系中,一次函数的图象
与
轴交于点
(
),与
轴交于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
,与一次函数
的图象
交于点
.
的函数表达式;
(2)直线
与
轴交于点
,求
的面积;
(3)如图,已知长方形
,
,
,
,矩形
的边
在
轴上平移,若矩形
与直线
或
有交点,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6999c91a4fb64645519432b6f22447d6.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/8d88fe72d221e3384b4511505c050168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6467f25eb97053da6a3cb645c9c28d9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.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/be18d37a5a85628d768de34f316dd761.png)
(3)如图,已知长方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/054a8894f35b6fc3e8a0ff415075255d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ecc984d04235bad093e355c6836ce8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab62385b03f83badc730b3fb4c80ed04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4095269a84ac5b6cdfd04274b590e1ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/054a8894f35b6fc3e8a0ff415075255d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/054a8894f35b6fc3e8a0ff415075255d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
22-23八年级下·河北石家庄·期中 查看更多[3]
河北省石家庄市第四十八中学2022-2023学年八年级下学期期中数学试题(已下线)第08讲 专题2 一次函数与几何图形-【帮课堂】2023-2024学年八年级数学下册同步学与练(人教版)(已下线)第19章 一次函数(单元测试·拔尖卷)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)
更新时间:2024-04-14 09:43:11
|
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解答题-问答题
|
较难
(0.4)
【推荐1】已知一次函数y=
x+3的图象与x轴、y轴分别交于A、B两点,以线段AB为直角边在第二象限内左等腰直角三角形ABC,∠BAC=90°,如图1所示.
![](https://img.xkw.com/dksih/QBM/2015/9/29/1573918493024256/1573918499512320/STEM/8146129c488a4c5db7d0de380fd70b6a.png)
(1)填空:AB= ,BC= .
(2)将△ABC绕点B逆时针旋转,
①当AC与x轴平行时,则点A的坐标是
②当旋转角为90°时,得到△BDE,如图2所示,求过B、D两点直线的函数关系式.
③在②的条件下,旋转过程中AC扫过的图形的面积是多少?
(3)将△ABC向右平移到△A′B′C′的位置,点C′为直线AB上的一点,请直接写出△ABC扫过的图形的面积.
![](https://img.xkw.com/dksih/QBM/2015/9/29/1573918493024256/1573918499512320/STEM/533722ca1e284eec90dac359432dbf90.png)
![](https://img.xkw.com/dksih/QBM/2015/9/29/1573918493024256/1573918499512320/STEM/8146129c488a4c5db7d0de380fd70b6a.png)
(1)填空:AB= ,BC= .
(2)将△ABC绕点B逆时针旋转,
①当AC与x轴平行时,则点A的坐标是
②当旋转角为90°时,得到△BDE,如图2所示,求过B、D两点直线的函数关系式.
③在②的条件下,旋转过程中AC扫过的图形的面积是多少?
(3)将△ABC向右平移到△A′B′C′的位置,点C′为直线AB上的一点,请直接写出△ABC扫过的图形的面积.
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名校
【推荐2】蓝莓被世界卫生组织列为十大健康食品之一,被人们视为“超级水果”,每年
月份是大棚蓝莓成熟的季节.某大棚蓝莓种植户计划在开始销售的40天内将种植的蓝莓陆续向市场供应.已知第x天的销售单价y(元/
)与第x(天)的函数关系如图,每天销售量为
.
![](https://img.xkw.com/dksih/QBM/2024/2/3/3425318060564480/3425815878549504/STEM/a06577e56a1940428a6fa71f944c2b2c.png?resizew=211)
(1)直接写出y与x的函数解析式;
(2)求第x天的种植户销售额w(元)与x的函数关系式;
(3)第几天种植户的销售额w的最大,最大值是多少元?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5903f51cc4dcb1d0becc1e2e2610b39f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f7c4a8558eff6427d22b6c0c855721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ac5444938c3355ad66f9bf6c030e81.png)
![](https://img.xkw.com/dksih/QBM/2024/2/3/3425318060564480/3425815878549504/STEM/a06577e56a1940428a6fa71f944c2b2c.png?resizew=211)
(1)直接写出y与x的函数解析式;
(2)求第x天的种植户销售额w(元)与x的函数关系式;
(3)第几天种植户的销售额w的最大,最大值是多少元?
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(0.4)
【推荐1】已知一次函数y1=kx+2(k≠0)和反比例函数
(m≠0).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/c3bf56d5-9d90-4873-b78b-bbe4b759ec4f.png?resizew=194)
(1)如图1,若函数y1,y2的图像都经过点A(1,3),B(-3,a).
①求m,k,a的值;
②连接AO,BO,判断
ABO的形状,并说明理由;
③当x>-3时,对于x的每一个值,函数y3=cx(c≠0)的值小于一次函数y1=kx+2的值,直接写出c的取值范围.
(2)当k=2,m=4,过点P(s,0)(s≠0)作x轴的垂线,交一次函数的图像于点M,交反比例函数的图像于点N,t取M与N的绝对值较小的纵坐标(若二者相等则任取其一),将所有这样的点(s,t)组成的图形记为图形T.直线y=n(n≠0)与图形的交点分别为C、D,若CD的值等于3,求n的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc4622a5f65ffbece28e09206b0cb8d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/c3bf56d5-9d90-4873-b78b-bbe4b759ec4f.png?resizew=194)
(1)如图1,若函数y1,y2的图像都经过点A(1,3),B(-3,a).
①求m,k,a的值;
②连接AO,BO,判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
③当x>-3时,对于x的每一个值,函数y3=cx(c≠0)的值小于一次函数y1=kx+2的值,直接写出c的取值范围.
(2)当k=2,m=4,过点P(s,0)(s≠0)作x轴的垂线,交一次函数的图像于点M,交反比例函数的图像于点N,t取M与N的绝对值较小的纵坐标(若二者相等则任取其一),将所有这样的点(s,t)组成的图形记为图形T.直线y=n(n≠0)与图形的交点分别为C、D,若CD的值等于3,求n的值.
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解答题-作图题
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【推荐2】若一个函数,对于自变量的不同取值范围,该函数有不同的表达式,则这样的函数称为“分段函数”.
当
时,
;当
时,
,可以记作分段函数
.
(1)若
时,画出
与
之间的函数图像,并写出该函数两条不同类型的性质.
(2)正比例函数
的图像与函数
的图像的一个交点坐标为
,当
时,
的取值范围是______;
(3)已知点
,函数
的图像与线段
的交点个数随
的值的变化而变化,直接写出交点个数及对应的
的取值范围.
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4689e9b7087b8bdc4df4e9f5019cfe42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f45dc0914f198d1b3a9353dd748257a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad5026db3679c5af37767cec2fa8f37.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/d999a4f2-577f-4bbb-b4d5-89e637d9a571.png?resizew=241)
(2)正比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc7ec65bf8050e3727fc1ff527992a11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a81f3d24e1f078675dfdaa8b1611120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99271992d5dd6374ce712253cede3e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐1】在平面直角坐标系中,直线
交
轴于点
,交
轴于点
若点
是直线
上的一个动点,点
和点
分别在
轴和
轴上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/056fb353-ddc2-4e2e-8820-4f83bafcf8af.png?resizew=439)
(1)
的值是______;
(2)若点
在线段
上,
,是否存在点
,使
,若存在,求出点
的坐标,若不存在,说明理由.
(3)若已知点
的坐标为(6,0),点
的坐标为(0,1),且四边形
的面积是
,求点
的坐标.
(4)当
平行于
轴,
平行于
轴时,若四边形
的周长是
,请直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b191419668f5db82a99531ae8333c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e8fd1ce0df99890a2147191d6fe8961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43301954c0bc4458aef7033c30b5f081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/056fb353-ddc2-4e2e-8820-4f83bafcf8af.png?resizew=439)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b019446b8d7c38ac63ff895c5d376f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b680231d068a1f6216295b47a61d0ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)若已知点
![](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/ddcbc4a1c603f1f9d5357d4f6e744fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddcbc4a1c603f1f9d5357d4f6e744fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f43677db00ba65a7f96fc49627d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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解题方法
【推荐2】如图,A、B、C、D为矩形的四个顶点,
,
,动点P、Q分别从点A,C同时出发,点P以
的速度向点B移动,一直到达B为止,点Q以
的速度向D移动.
(1)P、Q两点从出发开始到几秒时,四边形
的面积为
?
(2)P、Q两点从出发开始到几秒时,点P和点Q的距离是
?
(3)P、Q两点从出发开始到几秒时,点P、Q、D组成的三角形是等腰三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e04947c608f4b7f67b18e8decb05f70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d291cfc6c4677d20f8674c57322b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a28f94e768cd4ecb901fd857995fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ba95116dc790b935d65bf540799cea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/59f91a0c-efc0-4ce3-b9a8-05088aa7371c.png?resizew=88)
(1)P、Q两点从出发开始到几秒时,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d96e428931b19cf639d3e0f26ebe23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7389e293961e6bb094484734db9d8ec4.png)
(2)P、Q两点从出发开始到几秒时,点P和点Q的距离是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c280b0355df216440f40aefdcafcbe.png)
(3)P、Q两点从出发开始到几秒时,点P、Q、D组成的三角形是等腰三角形?
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解答题-证明题
|
较难
(0.4)
【推荐1】如图,
是四边形
的对角线,边
在其所在的直线上平移,将通过平移得到的线段记为
,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/88b76c32-5f7e-41aa-bf40-6ee9c21587d9.png?resizew=473)
(1)如图1,四边形
是正方形时,作
,垂足为O,连接
、
.判断
、
之间的数量关系和位置关系,并证明;
(2)如图2,四边形
是菱形时,设
,点O在
上,且
.判断
与
的数量关系,写出推理过程,并用含有
的代数式表示
;
(3)在(2)的条件下,若
,
,当四边形
是菱形时(如图3),请直接写出线段
平移的距离为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c118858379800688c993a8b61270b356.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/88b76c32-5f7e-41aa-bf40-6ee9c21587d9.png?resizew=473)
(1)如图1,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b9fd7a5b10127e9d60f0e3fa335f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
(2)如图2,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597ce705d3a2fe04d29de9e81ec6250d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b7ce7266232225de08d7c92642071c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3a3bf63440a2fdd769162516fb0e1c.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6850a299395c314b8f8f2f8ca50c9895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1337ce85d29edabcc2fadb9a9cc31ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bddc68ed03fe7fd1fe30a5e626ba435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】如图,如图1,在平面直角坐标系中,已知点A(﹣4,﹣1)、B(﹣2,1),将线段AB平移至线段CD,使点A的对应点C在x轴的正半轴上,点D在第一象限.
(1)若点C的坐标(k,0),求点D的坐标(用含k的式子表示);
(2)连接BD、BC,若三角形BCD的面积为5,求k的值;
(3)如图2,分别作∠ABC和∠ADC的平分线,它们交于点P,请写出∠A、和∠P和∠BCD之间的一个等量关系,并说明理由.
(1)若点C的坐标(k,0),求点D的坐标(用含k的式子表示);
(2)连接BD、BC,若三角形BCD的面积为5,求k的值;
(3)如图2,分别作∠ABC和∠ADC的平分线,它们交于点P,请写出∠A、和∠P和∠BCD之间的一个等量关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/402b48fd-dd58-4fc9-93ae-01561a7ecd41.png?resizew=529)
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较难
(0.4)
【推荐3】如图,直线y=4-x与两坐标轴分别相交于A、B点,点M是线段AB上任意一点(A、B两点除外),过M分别作MC⊥OA于点C,MD⊥OB于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/ab28c06d-4d34-4494-a7a5-9a6f8ee095bd.png?resizew=486)
(1)当点M在AB上运动时,四边形OCMD的周长为 ;
(2)当四边形OCMD为正方形时,将正方形OCMD沿着x轴的正方向移动,设平移的距离为a (0<a≤4),在平移过程中:
①当平移距离a=1时, 正方形OCMD与△AOB重叠部分的面积为 ;
②当平移距离a是多少时,正方形OCMD的面积被直线AB分成l:3两个部分?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/ab28c06d-4d34-4494-a7a5-9a6f8ee095bd.png?resizew=486)
(1)当点M在AB上运动时,四边形OCMD的周长为 ;
(2)当四边形OCMD为正方形时,将正方形OCMD沿着x轴的正方向移动,设平移的距离为a (0<a≤4),在平移过程中:
①当平移距离a=1时, 正方形OCMD与△AOB重叠部分的面积为 ;
②当平移距离a是多少时,正方形OCMD的面积被直线AB分成l:3两个部分?
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