【问题发现】如图1所示,将
绕点A逆时针旋转
得
,连接
、
,根据条件填空:
①
的度数为
;
②若
,则
的长为 ;
【类比探究】如图2所示,等边三角形
中,点D在
内部,连接
、
、
,若
,
,
,求
的长;
【拓展延伸】如图3所示,在四边形ABCD中,
,
,
、
为对角线,若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adaead91b4b6febfcdd6f995d81e550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
【类比探究】如图2所示,等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13d24842aa1623464a992591ea05e0b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72b466f14067ec8653e2cbbb2684245b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
【拓展延伸】如图3所示,在四边形ABCD中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236c134aad7d9a21c49c07e924b9a531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b69d2c4c81949cd0f901ce8894a7840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1e0985aaa7bbd7abc69249370c360c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4f5f987e3e24ca67f739191ce1e323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/5adccaf7-3ce1-4b63-a475-ff5a17692d59.png?resizew=422)
更新时间:2023-11-06 17:27:50
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相似题推荐
解答题-证明题
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【推荐1】已知等边△ABC中,AB=8,点D为边BC上一动点,以AD为边作等边△ADE,且点E与点D在直线AC的两侧,过点E作EF//BC,EF与AB、AC分别相交于点F、G.
(2)设BD=
,FG=
,求
关于
的函数解析式,并写出定义域;
(3)当AD的长为7时,求线段FG的长.
(2)设BD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)当AD的长为7时,求线段FG的长.
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【推荐2】如图1,四边形ABCD是正方形,将线段CD绕点C逆时针旋转α(0°<α<90°),得到线段CE,连接DE,过点B作BF⊥DE交DE的延长线于F,连接BE.依题意补全图1,并解答下列问题:
(1)当BE=CE时,直接写出旋转角α的度数;
(2)当旋转角α的大小发生变化时,∠BEF的度数是否发生变化?如果变化,请用含α的代数式表示;如果不变,请写出∠BEF的度数,并证明;
(3)连接AF,用等式表示线段AF与DE的数量关系,并证明.
(1)当BE=CE时,直接写出旋转角α的度数;
(2)当旋转角α的大小发生变化时,∠BEF的度数是否发生变化?如果变化,请用含α的代数式表示;如果不变,请写出∠BEF的度数,并证明;
(3)连接AF,用等式表示线段AF与DE的数量关系,并证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/80a045cf-57e2-4390-b18e-0bf390776a6d.png?resizew=399)
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【推荐1】如图①,四边形ABCD是边长为4的正方形,M是正方形对角线BD(不含B、D两个端点)上任意一点,将△BAM绕点B逆时针旋转60°得到△BEN,连接EA、MN;P是AD的中点,连接PM.
(1)AM+PM的最小值等于 ;
(2)求证:△BNM是等边三角形;
(3)如图②,以B为坐标原点建立平面直角坐标系,若点M使得AM+BM+CM的值最小,求M点的坐标.
(1)AM+PM的最小值等于 ;
(2)求证:△BNM是等边三角形;
(3)如图②,以B为坐标原点建立平面直角坐标系,若点M使得AM+BM+CM的值最小,求M点的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/7f3216cc-b2a4-4c8a-9837-baf3d2369a4e.png?resizew=449)
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【推荐2】阅读下面材料:
小明遇到这样一个问题:如图
,在
中,
分别交
于
,交
于
. 已知
,
,
,求
的值.
小明发现,过点
作
,交
延长线于点
,构造
,经过推理和计算能够使问题得到解决(如图2).
(2)参考小明思考问题的方法,解决问题:
如图
,已知
和矩形
,
与
交于点
,
,求
的度数.
小明遇到这样一个问题:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a0d2a2415ec1e1374ac46bc232f450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c69d0869f9b844a95ea8e16fee366f0.png)
小明发现,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800893728f4411472e6ffda490c7d10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
(2)参考小明思考问题的方法,解决问题:
如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30d2419028483dca7bd99022d551ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635ac77d420b4def265d590de5da72b5.png)
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【推荐1】综合与实践:
问题情境:数学课上,老师让每个组准备了一张如图1所示的等腰三角形纸片(即
),其中
,
,
是
边上的中线.老师要求各个小组结合所学的图形变化的知识展开数学.
探究
初步分析:(1)“勤学”小组发现图1中的
与
相等,请你证明这一结论;
操作探究:(2)“善思”小组将
纸片沿
剪开,然后保持
不动,将
从图1的位置开始运动.
①如图2,将
绕点
逆时针旋转
得到
,点
,
分别是
,
的对应点,连接
.猜想线段
与
之间的数量关系与位置关系,并说明理由;
②如图3,将
沿射线
方向平移得到
,点
,
,
分别是
,
,
的对应点.连接
,
交于点
.
请从下面
两题中任选一题作答.我选择______题.
A、当以
,
,
为顶点的三角形是等腰三角形时,直接写出平移的距离.
B、当以
,
,
为顶点的三角形是直角三角形时,直接写出平移的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/13/16af440e-3fa3-42b5-bfe4-a99e1cee03bf.png?resizew=481)
问题情境:数学课上,老师让每个组准备了一张如图1所示的等腰三角形纸片(即
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0117046e7a37bebe0c7b987a00d2bcb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
探究
初步分析:(1)“勤学”小组发现图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
操作探究:(2)“善思”小组将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
①如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c384685fc5cc1bb112dc6a50ab394f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
②如图3,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb883e3158077fa99dc4f7d7d850ff61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
请从下面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c72229b08c676c08a3c7258895375f2.png)
A、当以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
B、当以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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【推荐2】下面是某数学兴趣小组探究“三角形旋转动态分析”时对一道试题的分析,请仔细阅读,并完成相应的任务.
试题:
任务:
(1)小亮得到
的依据①是_________(从“
”“
”“
”“
”中选择一个).
(2)小明对原试题的条件进行了适当变动,将“点D为边
上一点”改为“点D为射线
上一点”其它条件不变,如图2,此时“
”是否仍然成立?并说明理由.
如图3,等边
中,
,点D为射线
上一点,将线段
绕点A逆时针旋转
得线段
,连接
,请直接写出线段
的长.
试题:
如图1,![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() 判断线段 ![]() ![]() |
…… ∵ ![]() ![]() ∴ ![]() …… 故 ![]() |
(1)小亮得到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b6bc70ba0b3deab2eddc0d2248b3186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2ba04decd9d9204ec64d567af55721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9970629e91021aa64fb871c83746418c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec76570a0ddc83c103a4b77589d80701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cbfd199e0ba3e1ec7016a44454e7a3c.png)
(2)小明对原试题的条件进行了适当变动,将“点D为边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63dd9e43e4673d26f3a8c24878cd5a6c.png)
如图3,等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e511e9c2e0b7b2c7627224c856535c82.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/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27763f6dcbae61e12858d1893034164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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【推荐3】综合与实践
问题情境:数学活动课上,老师将两个具有公共顶点的全等三角形按图1所示摆放,
,
,
,
.老师让各小组在此基础上展开探究.
延长,分别交
于点O和点F,试判断
与
的数量关系并说明理由;
深入探究:(2)善思小组固定
,将
绕点B逆时针旋转,如图2,当
时,
与
相交于点P,过点P作
于点Q,试判断
与
的数量关系并说明理由;
拓展延伸:(3)创新小组将图1中的
绕点B逆时针旋转,如图3,当
时,
与
相交于点M,过点M作
于点N.若
,
,请直接写出
的长.
问题情境:数学活动课上,老师将两个具有公共顶点的全等三角形按图1所示摆放,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74db1f028c135803c5f56852ec330d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546f5e3bf6a3b60f85ea730a6cd7b36e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226c231c1150e27c34eb787a46b02ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8915e8e775538d41debf1933102c6b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17487118ab7a90fc8c91bf0870f3289e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e054d52ef2c878ea3097ef237f1d3801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
深入探究:(2)善思小组固定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f10327213a940d94a796ba0bb46d42a.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/92b154270249b0ef54ddb26137b2681a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7944350f95810a29ca8c032bc1d6659e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
拓展延伸:(3)创新小组将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78ee2cb6caf7d7ee877796d18e53907.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/66fae8e33cd86fa8dab72704eaafe1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fc998d33cdf37c272f79cfd64b7b99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在 Rt△ABC 中,∠ACB=90°,AC=6cm,∠ABC=30°,动点 P 从点 B 出发,在 BA 边上以每秒 2cm 的速度向点 A 匀速运动,同时动点 Q 从点 C 出发,在 CB 边上以每秒
cm 的速度向点 B 匀速运动,运动时间为 t 秒(0≤t≤6),连接 PQ,以 PQ 为直径作⊙O.
(1)当 t=1 时,求△BPQ 的面积;
(2)设⊙O 的面积为 y,求 y 与 t 的函数解析式;
(3)若⊙O 与 Rt△ABC 的一条边相切,求 t 的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)当 t=1 时,求△BPQ 的面积;
(2)设⊙O 的面积为 y,求 y 与 t 的函数解析式;
(3)若⊙O 与 Rt△ABC 的一条边相切,求 t 的值.
![](https://img.xkw.com/dksih/QBM/2019/1/10/2115753144459264/2120518080757760/STEM/663859e9cee14a51aa67dceda9764ea0.png?resizew=146)
您最近一年使用:0次
【推荐2】如图,
的对角线
交于点E,以
为直径的
经过点E,与
交于点F,G是
延长线上一点,连接
,交
于点H,且
.
![](https://img.xkw.com/dksih/QBM/2020/8/7/2522795043635200/2522879985729536/STEM/0d270d1785b54fcfb7490be03d4c4b57.png?resizew=247)
(1)求证:
是
的切线;
(2)若
,
,求
的直径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6168766c246ce9c7f1faa2bffc4a4157.png)
![](https://img.xkw.com/dksih/QBM/2020/8/7/2522795043635200/2522879985729536/STEM/0d270d1785b54fcfb7490be03d4c4b57.png?resizew=247)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e7a14fd683fa8a8d477338703241af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f497727bb5aa928d843852bf88abc917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次