在下面的平面直角坐标系中先描出
、
、
,然后顺次连接三点,判断
的形状,并且求其面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6ce39c72b38fa1a2b3275188b27689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8290733c83028f6e03753f66ac263ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b847b19ddba34cb51b4620be81f792b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2019/11/5/2327358788313088/2327414557696000/STEM/96547d1d11a546dda8418179bf218c2f.png?resizew=204)
更新时间:2019-11-05 16:39:57
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相似题推荐
解答题-证明题
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【推荐1】如图,
是
的弦,半径
,垂足为
,弦
与
交于点
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/8488e93c-e5f7-4108-bf16-fd23ac928877.png?resizew=125)
(1)求证:
;
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771b610e4ddefa739a985d1e5462ce5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6d50515fc65885d44cd6a3c41e6a7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/8488e93c-e5f7-4108-bf16-fd23ac928877.png?resizew=125)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f63e3d15c7aac73ccfeca5b61b95888.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e2a44d05b1d387150c4b359e021ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5b6e223eb89d551b0f6fa05ba7bbaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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【推荐2】已知
,
.
为边作等边
,且点E恰好在边
上,则
的面积为______;
(2)如图2,若以
为斜边作等腰直角三角形
,且点F恰好在边
上,过C作
交
于G,连接
.用等式表示此时线段
之间的数量关系,并证明;
(3)如图3,以
为边作
,且
,
.若
,直接用等式表示此时
与
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
(2)如图2,若以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a3dedd220e092abe57bbfe98acda38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9693bfa787eaf5026619fd616fe1ba49.png)
(3)如图3,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2fdf4148442139cad2e1b7cc1b0bec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2852fbd1b5e98e5fac1b31309ccbd60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b7b0d1f022143cd6e5fd56b7497a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffc853db2abbdc8f5746405cd0fbc9e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c023f4b501684abd869b36d6e6c7f21f.png)
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名校
【推荐1】热爱学习的小明同学在网上搜索到下面的文字材料:
在x轴上有两个点它们的坐标分别为(a,0)和(c,0).则这两个点所成的线段的长为|a﹣c|;同样,若在y轴上的两点坐标分别为(0,b)和(0,d),则这两个点所成的线段的长为|b﹣d|.如图1,在直角坐标系中的任意两点P1,P2,其坐标分别为(a,b)和(c,d),分别过这两个点作两坐标轴的平行线,构成一个直角三角形,其中直角边P1Q=|a﹣c|,P2Q=|b﹣d|,利用勾股定理可得:线段P1P2的长为
.
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399707474960384/2400370738962432/STEM/8e1246b074904e91ba12b274048370c1.png?resizew=376)
根据上面材料,回答下面的问题:
(1)在平面直角坐标系中,已知A(6,﹣1),B(6,5),则线段AB的长为 ;
(2)若点C在y轴上,点D的坐标是(﹣3,0),且CD=6,则点C的坐标是 ;
(3)如图2,在直角坐标系中,点A,B的坐标分别为(1,4)和(3,0),点C是y轴上的一个动点,且A,B,C三点不在同一条直线上,求△ABC周长的最小值.
在x轴上有两个点它们的坐标分别为(a,0)和(c,0).则这两个点所成的线段的长为|a﹣c|;同样,若在y轴上的两点坐标分别为(0,b)和(0,d),则这两个点所成的线段的长为|b﹣d|.如图1,在直角坐标系中的任意两点P1,P2,其坐标分别为(a,b)和(c,d),分别过这两个点作两坐标轴的平行线,构成一个直角三角形,其中直角边P1Q=|a﹣c|,P2Q=|b﹣d|,利用勾股定理可得:线段P1P2的长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c954cfd5445e10d5cba95d21f92fd6c.png)
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399707474960384/2400370738962432/STEM/8e1246b074904e91ba12b274048370c1.png?resizew=376)
根据上面材料,回答下面的问题:
(1)在平面直角坐标系中,已知A(6,﹣1),B(6,5),则线段AB的长为 ;
(2)若点C在y轴上,点D的坐标是(﹣3,0),且CD=6,则点C的坐标是 ;
(3)如图2,在直角坐标系中,点A,B的坐标分别为(1,4)和(3,0),点C是y轴上的一个动点,且A,B,C三点不在同一条直线上,求△ABC周长的最小值.
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【推荐2】如图,反比例函数
的图象与一次函数
的图象交于第一、三象限内的
,
两点,点
的坐标为
,点
的坐标为
.
![](https://img.xkw.com/dksih/QBM/2022/4/6/2952535057924096/2967821830094848/STEM/75fe996f-3488-45b6-b008-865441b371cc.png?resizew=386)
(1)求反比例函数解析式;
(2)填空:①不等式
的解集是________;②线段
的长为________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46ef855860afc066c835cdf173e0d1f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29790d607d5de594362d7e70d5ac602c.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14f5f3faeb5a54f396059715995150e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f7f9669efa51e14ea600463f533301.png)
![](https://img.xkw.com/dksih/QBM/2022/4/6/2952535057924096/2967821830094848/STEM/75fe996f-3488-45b6-b008-865441b371cc.png?resizew=386)
(1)求反比例函数解析式;
(2)填空:①不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540782ba0413723647c095b294509c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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