题型:解答题-问答题
难度:0.65
引用次数:790
题号:19992784
如图1,在平面直角坐标系中,
,且满足
,过C作
轴于B.
的面积.
(2)若过B作
交y轴于D,且
分别平分
,如图2,求
的度数.
(3)在y轴上是否存在点P,使得
和
的面积相等?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/8bba33c12524ed771c0cc3bd2ee2bdf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f555c4049d6aa23c9a34cf950e10e60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02db4a8c065ddf418ce67b8a98a29c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若过B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c631670e02d2a38e9c78708a3916140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e88d8672e8521e27058252f51000281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561c994a7a5757c47ca55fe46a1bf55b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd1bc0388e7fad3e849ca39c67f5034.png)
(3)在y轴上是否存在点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
更新时间:2023-08-23 10:12:41
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解答题-问答题
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适中
(0.65)
【推荐2】已知
的三边长分别为a,b,c,且a,b,c满足
,试判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
【推荐1】如图1,已知正方形
顶点
,
分别在
轴和
轴上,边
交
轴的正半轴于点
.
![](https://img.xkw.com/dksih/QBM/2020/10/27/2579972800946176/2580239870222336/STEM/f4549fd4af3647178a8b681a1490e23b.png?resizew=139)
(1)若
,且
,求
点的坐标.
(2)在(1)的条件下,若
,
点的坐标.
(3)如图2,连结
交
轴于点
,点
是
点上方轴上一动点,以
,
为边作平行四边形
,使
点恰好落在
边上.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2020/10/27/2579972800946176/2580239870222336/STEM/f4549fd4af3647178a8b681a1490e23b.png?resizew=139)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9fdc8bce44c7ade4434f11ca251bd28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1cb04a536bee708031eadf174ac698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/766fd83e77cf40a3874752de9071996c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)如图2,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e27d700becd7569ab631bc3113646a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐2】在如图所示的平面直角坐标系中四边形
.
(1)分别写出点A、B、C、D的坐标;
(2)求这个四边形
的周长;
(3)求这个四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/8/6af36f76-f721-4ba3-86df-7d20e6558924.png?resizew=310)
(1)分别写出点A、B、C、D的坐标;
(2)求这个四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)求这个四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-证明题
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【推荐1】如图1,
,点
位于
,
之间,
为钝角,
,垂足为点
.
,则
______;
(2)如图2,过点
作
,交
的延长线于点
,求证:
;
(3)如图3,在(2)间的条件下,
平分
交
于点
,若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039237a985c7e47195393a1881b32673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735bd70c2fa2bf51fd7aa448b20d0be1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b847934372c594ef89f230b1461c879.png)
(2)如图2,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e46ba5224d2f60ef6938717a4c48ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb138968e1bcbcd84e4dda73e0da7c8.png)
(3)如图3,在(2)间的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142544a6d4e6851096afbd3cbad2fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a63861b5c1c110e3599867934187c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6beda2518cf76da94d7ec9a813dcfa82.png)
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解答题-证明题
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适中
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【推荐2】知识链接:
光遇到平面镜会发生反射,如图①,经过入射点O并垂直于反射面的直线叫做法线,入射光线与法线的夹角
叫做入射角,反射光线与法线的夹角r叫做反射角,根据光的反射定律,反射角等于入射角.
解答问题:
自行车尾灯就是根据光的反射定律制造而成,光线无论从什么角度入射,入射光线经过两次反射后,最终的反射光线都会平行于入射光线射出,所以,在夜晚用手电筒照射尾灯,都会将光线反射到人眼,给人警示作用.如图②,
是自行车尾灯的一个组成元件,由两块可反射光线的材料
,
组成,一束入射光线
照射在
上D处,经过两次反射后得到反射光线
,
,其中
、
为法线.
,求
;
(2)猜想
的度数,并证明你的猜想.
光遇到平面镜会发生反射,如图①,经过入射点O并垂直于反射面的直线叫做法线,入射光线与法线的夹角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
解答问题:
自行车尾灯就是根据光的反射定律制造而成,光线无论从什么角度入射,入射光线经过两次反射后,最终的反射光线都会平行于入射光线射出,所以,在夜晚用手电筒照射尾灯,都会将光线反射到人眼,给人警示作用.如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c41158715d94c6c9ffebdee957d2618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d20d0310913babcde06a1cdbd62a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f703d795350ecb798e3ba625ca81ebc.png)
(2)猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
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解答题-证明题
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【推荐2】如图,边长为2的正方形ABCD中,P是对角线AC上的一个动点(点P不与A、C重合),连结BP,过点B作
且使得
,连结QP交BC于点E,延长QP与直线AD交于点F.
![](https://img.xkw.com/dksih/QBM/2020/12/27/2623383988600832/2625069026197504/STEM/2c73432e5ca34280b0fe46866e1670fd.png?resizew=182)
(1)
面积的最小值为______;
(2)连结CQ,求证:
;
(3)猜想PF与EQ的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635bbc7501254478a0e73473b2748d2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdd3306635136ecd47c24e3cf161851b.png)
![](https://img.xkw.com/dksih/QBM/2020/12/27/2623383988600832/2625069026197504/STEM/2c73432e5ca34280b0fe46866e1670fd.png?resizew=182)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
(2)连结CQ,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1294b21ef6800dfdabe426d34e8b563.png)
(3)猜想PF与EQ的数量关系,并说明理由.
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