如图①,在平面直角坐标系中,O为坐标原点,
的边
在x轴上,A,B两点的坐标分别为
,
,且
,点C的坐标为
,
,点P为x轴上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/e8639b92-f186-4cd4-8fcf-0a7d27e39bc4.png?resizew=617)
(1)点A的坐标是__________,点B的坐标是__________.
(2)如图②,连接
,当
时,求AP的长.
(3)如图③,点P从点A出发,以每秒2个单位长度的速度向点B运动,同时点Q从点B出发,以每秒1个单位长度的速度向点C运动,已知
,设运动时间为
秒.当
是直角三角形时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b67c623950b5795d5fb4daeb8102a8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae3a88c614758672f5d2f2149236476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8daa3903515b08aee7da9847ecf23f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4159b0469eb8e61eb5f6278a80176a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/e8639b92-f186-4cd4-8fcf-0a7d27e39bc4.png?resizew=617)
(1)点A的坐标是__________,点B的坐标是__________.
(2)如图②,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5005fd6da968d3d256dec0e9cab69a.png)
(3)如图③,点P从点A出发,以每秒2个单位长度的速度向点B运动,同时点Q从点B出发,以每秒1个单位长度的速度向点C运动,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028eaeb9757d156aab61881cc1c7e343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba500a9a5f22c878548ea9d646d8c057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a551505ae42b49904bab59b17012d8.png)
更新时间:2022-11-15 13:31:39
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相似题推荐
解答题-问答题
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【推荐1】已知
是最小的正整数,且
、
满足
,请回答:
(1)则
______,
______,
______.
(2)若点
为一动点,其对应的数为
,则
的最小值为______.
(3)
、
、
分别对应的点
、
、
开始在数轴上运动,若点
以每秒1个单位长度的速度向左运动,同时,点
和点
分别以每秒2个单位长度和5个单位长度的速度向右运动,假设
秒钟过后,若点
与点
之间的距离表示为
,点
与点
之间的距离表示为
.请问:
的值是否随着时间
的变化而改变?若变化,请说明理由,若不变,请求其值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/399d0c91033706da5e2a40ac84bb815e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/29/bec93ac9-3a9d-406b-a8cf-d152fa016d73.png?resizew=202)
(1)则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1055a00c42ef0cf7d58027a54fafbc97.png)
(3)
![](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/5963abe8f421bd99a2aaa94831a951e9.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/5963abe8f421bd99a2aaa94831a951e9.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/36a1b09c653185842513e24ebba60bb3.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5634ee44d1e1316e03bbfc8e4828b15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】定义:若线段
上有一点
,当
时,则称点
为线段
的中点.已知数轴上
两点对应数分别为
和
,
,D为数轴上一动点,对应数为
.
(1)
______,
______.
(2)若点D为线段
的中点,则D点对应的数
为______.若
为线段
的中点时则
点对应的数
为______.
(3)若点A、点
同时向左运动,它们的速度都为1个单位长度/秒,与此同时点D从
处以2个单位长度/秒向右运动.
①设运动的时间为
秒,直接用含
的代数式填空:点A表示的数是______.
②经过多长时间后,点A、点
、点D三点中其中一点是另外两点的中点?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/fae13e8ef7a7ba12f5917dead1b5ae58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)若点D为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若点A、点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec54f53122364c46e1e43d1a84f210fd.png)
①设运动的时间为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②经过多长时间后,点A、点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐1】如图,已知A(﹣2,3)、B(4,3).C(﹣1,﹣3)
![](https://img.xkw.com/dksih/QBM/2019/12/12/2353612918669312/2354356347699200/STEM/5507123a251646aca194f7b70fe41133.png?resizew=212)
(1)点B到坐标原点的距离为 ;
(2)求BC的长;
(3)点P在y轴上,当△ABP的面积为6时,请直接写出点P的坐标.
![](https://img.xkw.com/dksih/QBM/2019/12/12/2353612918669312/2354356347699200/STEM/5507123a251646aca194f7b70fe41133.png?resizew=212)
(1)点B到坐标原点的距离为 ;
(2)求BC的长;
(3)点P在y轴上,当△ABP的面积为6时,请直接写出点P的坐标.
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【推荐2】类比学习是知识内化的有效途径,认真读题是正确审题的第一步:对于平面直角坐标系xOy中的点P(a,b),若点
的坐标为
(其中k为常数,且k≠0),则称点
为点P的“k系好友点”;例如:P(1,2)的“3系好友点”为
即
.请完成下列各题:
(1)点P(-3,1)的“2系好友点”
的坐标为______.
(2)若点P在y轴的正半轴上,点P的“k系好友点”为
点,若在三角形
中,
,求k的值.
(3)已知点A(x,y)在第四象限,且满足xy=-8;点A是点B(m,n)的“-2系好友点”,求m-2n的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbc1587fb05556185a464289b853762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf0a9ae232a21285122c291da581e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a594acd075649e89c8e1bbc6296a1bd.png)
(1)点P(-3,1)的“2系好友点”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
(2)若点P在y轴的正半轴上,点P的“k系好友点”为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c40be83ff0784c6df49155e7acac193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c6a2cd00301bf1818014ec7bee7c8bc.png)
(3)已知点A(x,y)在第四象限,且满足xy=-8;点A是点B(m,n)的“-2系好友点”,求m-2n的值.
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【推荐1】探究与发现:如图,在Rt△ABC中,∠BAC=90°,AB=AC,点D在底边BC上,AE=AD,连结DE.
![](https://img.xkw.com/dksih/QBM/2019/10/9/2308270739103744/2309717533974528/STEM/e82603ce16164a69be37e8aa729f8513.png?resizew=139)
(1)当∠BAD=60°时,求∠CDE的度数;
(2)当点D在BC (点B、C除外) 上运动时,试猜想并探究∠BAD与∠CDE的数量关系.
![](https://img.xkw.com/dksih/QBM/2019/10/9/2308270739103744/2309717533974528/STEM/e82603ce16164a69be37e8aa729f8513.png?resizew=139)
(1)当∠BAD=60°时,求∠CDE的度数;
(2)当点D在BC (点B、C除外) 上运动时,试猜想并探究∠BAD与∠CDE的数量关系.
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【推荐2】如图,已知
,点C、D分别为线段
、
上的动点,若点C从点O出发以
的速度沿
方向运动,同时点D从点B出发以
的速度沿
方向运动.
(1)如图1,当运动时间为
时,求
的值;
(2)如图1,若在运动过程中,始终保持
,求OA的长;
(3)如图2,在(2)的条件下,延长BO到点M,使
,点P是直线OB上一点,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ecfd9ce83c6f1c82573c12c43f7af33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e5acdedbab4bba6a4f5defc72c70b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/10/bbb77862-8ab0-4f92-b6e9-c0bae46594eb.png?resizew=562)
(1)如图1,当运动时间为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c1f9c14db1a10006f079739ffa690d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68105f06e456e5c4fe8be3f5f422d44e.png)
(2)如图1,若在运动过程中,始终保持
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0018b3431572904ee80973d2272d982.png)
(3)如图2,在(2)的条件下,延长BO到点M,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5de44310b7ae22de1884a47ec9811fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc477a1ef70e7df2400ac423a8f34e95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058e9d29b8ed74df45fc9b993f8f346b.png)
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【推荐1】如图,已知
中,D是
的中点,过点D作
交
于点E,过点A作
交
于点F,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/e5446632-6e1e-46ba-994c-10ea7e6fec64.png?resizew=193)
(1)求证:四边形
是菱形;
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6095bae4840bfa80f2468f94b2002d7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851ab1aa713a2d1c21e886c8acd3f0d2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/e5446632-6e1e-46ba-994c-10ea7e6fec64.png?resizew=193)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0524c3287106a4460858ed3926989a4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8eb9b46b94f5d6419ca146419b53373.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】如图,在△ABC中,∠C=90°,∠B=15°,AB的垂直平分线分别与BC,AB交于点M.N.试说明MB与AC的大小关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/7d00fd4d-c68d-485e-b831-4dfcdb37742c.png?resizew=193)
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