如图,已知点B(a,b)满足
.过点B分别作BA⊥x轴、BC⊥y轴,垂足分别是点A、C.
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957533388341248/2962433456029696/STEM/ad1d4642-8d7e-423a-8185-c571eb06b8a8.png?resizew=612)
(1)求出点B的坐标;
(2)点M是边OA上的一个动点(不与点A重合),∠CMA的角平分线交射线CB于点N,在点M运动过程中,
的值是否变化?若不变,求出其值;若变化,说明理由;
(3)在四边形OABC的边上时否存在点P,使得BP将四边形OABC分成面积比为1:4的两部分?若存在,请直接写出点P的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7d1219d0cdaa75956f8c482dbba5e8.png)
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957533388341248/2962433456029696/STEM/ad1d4642-8d7e-423a-8185-c571eb06b8a8.png?resizew=612)
(1)求出点B的坐标;
(2)点M是边OA上的一个动点(不与点A重合),∠CMA的角平分线交射线CB于点N,在点M运动过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd27610c9b1a0ef88fea9b006c88adb4.png)
(3)在四边形OABC的边上时否存在点P,使得BP将四边形OABC分成面积比为1:4的两部分?若存在,请直接写出点P的坐标;若不存在,说明理由.
更新时间:2022-04-20 21:09:12
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相似题推荐
解答题-问答题
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(0.4)
【推荐1】如图所示,在平面直角坐标系
中,点A,
,
的坐标为
,
,
,其中
,
,
满足
,
.
(1)求
,
,
的值;
(2)若
在
轴上,且
,求
点坐标;
(3)如果在第二象限内有一点
,
在什么取值范围时,
的面积不大于
的面积?求出在符合条件下,
面积最大值时点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4a90cfdbfa05577b6ec0b22739e7c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabe33b24e9cabf7a5530bc75d37da2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f00fdb0b1dfb21a2e192990b79be37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f81c1e91ae24e4af740798f1eaea29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc3b5adde543bdd99d10f0b8e32a346.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b778d2f43e5531a611c7550821846e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)如果在第二象限内有一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26178e9ecc496514c4a3d8ab8cb04fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754059361280000/2788665471655936/STEM/75ed19bb-7524-4396-a8d1-65ae0786b6f2.png)
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解题方法
【推荐2】如图,过点P作直线分别与直线
,
相交于E、F两点,
的角平分线交直线
于点M,射线
交直线
于点N.设
,
,
,其中x、y、z满足
.
___________,
___________,
___________;
(2)求证:
;
(3)过点P作直线
分别交直线
于点Q,交直线
于点R,且Q不与M重合,R不与N重合.作
的角平分线交线段
于点S,直接写出
与
的数量关系___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a09d2d1b9b9d4562d74196cef3e3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa45ecd9c9de27f5b015f29d4e0a9b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3f8edea644161c25a4069c6f050d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba463005c080eaf4a54ce4acbbdb6b55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403d586a79e95762c6efd24015ff44dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d67321ace1e6b3be0fc0e5e8130022.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
(3)过点P作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48bcfe17f5e6286fefa02c442ab5f58f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a3b814c8cf9fbbc82045f1536459e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68533e1398da163c98c18626f734693.png)
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【推荐1】已知直线
,点P在直线
之间,连接
.
,直接写出
的大小;
(2)如图2,点Q在
之间,
,试探究
和
的数量关系,并说明理由;
(3)如图3,
的角平分线交CD于点M,且
,点N在直线
之间,连接
,
,直接写出
的值(用含n的式子表示,题中的角均指大于
且小于
的角).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a13e1565e5977304abe033ea80742f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108fe69b0096d1d2e0e06d3c25bb2d05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29ea1931cce6cde747b196284bab35b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d221944148d71e2e1bc76040aefb8d.png)
(2)如图2,点Q在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a13e1565e5977304abe033ea80742f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fa678c5dd9d35314a23d786989ddfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50677b86ad4d651238d26934175f133.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bafaec1cbb31d644a0df6bbd4fe4f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb723a7260828e94918af586ad9420a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a13e1565e5977304abe033ea80742f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ceb3a055b8c4885abe46bab6ae6816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8468a777af4757ab8f8f03008ac867f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9021d28f5e900f100c6b9db5165d3b07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235d495d88b8e51f89e2e4da27328025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
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【推荐2】【感知】如图①,AB∥CD,点E在直线AB与CD之间,连结AE、BE,试说明∠BAE+∠DCE=∠AEC;
【探究】当点E在如图②的位置时,其他条件不变,试说明∠AEC+∠BAE+∠DCE=360°;
【应用】点E、F、G在直线AB与CD之间,连结AE、EF、FG和CG,其他条件不变,如图③,若∠EFG=36°,则∠BAE+∠AEF+∠FGC+∠DCG=______°.
【探究】当点E在如图②的位置时,其他条件不变,试说明∠AEC+∠BAE+∠DCE=360°;
【应用】点E、F、G在直线AB与CD之间,连结AE、EF、FG和CG,其他条件不变,如图③,若∠EFG=36°,则∠BAE+∠AEF+∠FGC+∠DCG=______°.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/cfe255a4-b6a6-4404-a347-6f589eac5480.png?resizew=411)
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名校
【推荐1】在
和
中,
,点D是
延长线上一动点,点E在线段
上,连接
与
交于点F.
,求
的长.
(2)如图2,若
,求证:
.
(3)如图3,移动点D,使得点F是线段
的中点时,
,点
分别是线段
上的动点,且
,连接
,请直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef04f457ec69b0801f38a45073127ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac6a9cb73b138429b2d4d94c1d3f67a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eac6f98ed81727dc5f6699ea5117fff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b49660a786299fbd9e5da2be8d0c8c5f.png)
(3)如图3,移动点D,使得点F是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6715bb2018a73a511342bc8b0436372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51dfab0c1ec275ff83d08c7293968c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9393c11bbe89cd5421f7560709ddc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6721283acd0343d85446728065f92b1b.png)
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【推荐2】如图,在直角梯形
中,
,
,
,
,
,动点P从点A开始沿AD边向点D以
速度运动,动点Q从点C开始沿CB边向点B以
的速度运动.点P、Q分别从点A、C同时出发,当其中一点到达端点时,另一点随之停止运动.设运动时间为t秒.求:
![](https://img.xkw.com/dksih/QBM/2022/1/6/2894319329910784/2959192187723776/STEM/be0ddc6b-4b22-4f9c-a3ac-a4ff60122f7c.png?resizew=281)
(1)t为何值时,四边形PQCD为平行四边形?
(2)t为何值时,四边形ABQP为矩形?
(3)是否存在
,使梯形ABQP的面积为
?若存在请求出,若不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f52b96ec999ba7c3ecf04e13aa91bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ea66fef72e9e929f2315f85dc01a6a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e5acdedbab4bba6a4f5defc72c70b6.png)
![](https://img.xkw.com/dksih/QBM/2022/1/6/2894319329910784/2959192187723776/STEM/be0ddc6b-4b22-4f9c-a3ac-a4ff60122f7c.png?resizew=281)
(1)t为何值时,四边形PQCD为平行四边形?
(2)t为何值时,四边形ABQP为矩形?
(3)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2c7aaa24c251b10f1c7a0dce744602.png)
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【推荐1】【问题探究】
(1)如图1,已知
,点D是
的中点,连接
,则
(填“
”“
”或“
”)
(2)如图2,在梯形
中,
,请过点A作一条直线
平分梯形
的面积,点P是
与
的交点,并说明理由;
【问题解决】
(3)如图3是某公园的一块空地,由
和四边形
组成,
,
,
米,
,
,公园管理人员现准备过点A修一条笔直的小路
(小路面积忽略不计),将这块空地分成面积相等的两部分(点M在
边上),分别种植两种不同的花卉,请在图中确定点M的位置,并计算小路
的长.(结果保留根号)
(1)如图1,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4673ef63a8d89687b96ee09887ac3daa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c141b06b158e0cdef08fcda3ea44a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(2)如图2,在梯形
![](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/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
【问题解决】
(3)如图3是某公园的一块空地,由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa485cf3776f36aaf4abaadaf30fb85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077956e5f55232814d1a077af264590e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56b1879d919064e3839b8aea8d3459b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41f2f95d643629321deb6e905c4f1ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a868322c7ec1b016a23df3ea18183080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d61f0d746987c2f76f5e061f71fc45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25120e4c19a21da5596451798c255902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1165830b314a0dab65ea267e82bd3f6.png)
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解答题-证明题
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较难
(0.4)
解题方法
【推荐2】定义:有两个相邻内角互余的凸四边形称为互余四边形,这两个角的夹边称为互余线.
(2)如图2,在5×4的方格纸中,A、B在格点上,请画出一个符合条件的互余四边形ABEF,使AB是互余线,E、F在格点上;
(3)如图3,在(1)的条件下,取EF中点M,连接DM并延长交AB于点Q,延长EF交AC于点N,若N为AC的中点,DE=2BE,如互余线AB=10,求BQ的长.
(2)如图2,在5×4的方格纸中,A、B在格点上,请画出一个符合条件的互余四边形ABEF,使AB是互余线,E、F在格点上;
(3)如图3,在(1)的条件下,取EF中点M,连接DM并延长交AB于点Q,延长EF交AC于点N,若N为AC的中点,DE=2BE,如互余线AB=10,求BQ的长.
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