如图,在边长为2的正方形ABCD中,以点D为圆心、DC为半径作
,点E在AB上,且与A、B两点均不重合,点M在AD上,且ME=MD,过点E作EF⊥ME,交BC于点F,连接DE、MF.
![](https://img.xkw.com/dksih/QBM/2013/9/7/1573679607652352/1573679614033920/STEM/37b7e21d73d6457cb9f80d32ab9f335a.png)
(1)求证:EF是
所在⊙D的切线;
(2)当MA=
时,求MF的长;
(3)试探究:△MFE能否是等腰直角三角形?若是,请直接写出MF的长度;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b0f9a2dd7795b1e35e8ff355b48ea2.png)
![](https://img.xkw.com/dksih/QBM/2013/9/7/1573679607652352/1573679614033920/STEM/37b7e21d73d6457cb9f80d32ab9f335a.png)
(1)求证:EF是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b0f9a2dd7795b1e35e8ff355b48ea2.png)
(2)当MA=
![](https://img.xkw.com/dksih/QBM/2013/9/7/1573679607652352/1573679614033920/STEM/8de371babadd44efba43a1e017e6ed67.png)
(3)试探究:△MFE能否是等腰直角三角形?若是,请直接写出MF的长度;若不是,请说明理由.
更新时间:2016-12-05 18:42:16
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】在
中,
,点
在
上,且
,以
为边向右作等边
,过
作
,垂足为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/63a2f5fa-6785-44db-8892-b7aa5c57727d.png?resizew=179)
(1)求
的度数;
(2)当
时,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b4e453406dad357caf3faea5cbae6.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/7305de9211785b826823153897b17517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/63a2f5fa-6785-44db-8892-b7aa5c57727d.png?resizew=179)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d74465c34ad7afa5d39d9e300bdf86.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a81d63da32eb9501a0099ee7fd8df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
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较难
(0.4)
【推荐2】如图,正方形
的边
、
在坐标轴上,点
的坐标为
.点
从点A 出发,以每秒
个单位长度的速度沿
轴向点
运动;点
从点
同时出发,以相同的速度沿
轴的正方向运动,规定点
到达点
时,点
也停止运动.连接
,过
点作
的垂线,与过点
平行于
轴的直线
相交于点
.
与
轴交于点
,连接
.设点
运动的时间为
.
的度数为_________,点
的坐标为___________(用
表示);
(2)在
的运动过程中,直线
的解析式发生变化吗?如果不变,请直接写出直线
的解析式;
(3)探索
的周长是否随时间
的变化而变化,若变化,说明理由;若不变,试求这个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20aa36cae34afaa391a4319c9c5eb87a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fb80b591b497d8d7a6d8592160de44.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
(3)探索
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b98bec817e96fba365ba496ad3b9af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在矩形
中,
,
,P为边
上一点,连接
,过点P作
交
于点Q,连接
,当
平分
时:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/c65ff914-50db-49c4-b22f-f7c73619bd99.png?resizew=305)
(1)证明:
;
(2)求四边形
的面积;
(3)M为直线
或直线
上一点,在平面内是否存在点N,使以P,C,M,N为顶点的四边形为矩形?若存在,请直接写出
的长度: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/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf7cc67acfa50ef6b21d9aa379e604a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/c65ff914-50db-49c4-b22f-f7c73619bd99.png?resizew=305)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da8d0a490b249cc80e3013a14b45708.png)
(2)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5959113de815ad1dc1227583ce0c3920.png)
(3)M为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
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解答题-证明题
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【推荐2】正方形ABCD的边长为6,点P在对角线BD上,点E是线段AD上或AD的延长线上的一点,且PE⊥PC.
(1)如图1,点E在线段AD上,求证:PC=PE;
(2)如图2,点E在线段AD的延长线上,请补全图形,并判断(1)中的结论是否仍然成立?(不必说明理由);
(3)若DE=2,求PD的长.
(1)如图1,点E在线段AD上,求证:PC=PE;
(2)如图2,点E在线段AD的延长线上,请补全图形,并判断(1)中的结论是否仍然成立?(不必说明理由);
(3)若DE=2,求PD的长.
![](https://img.xkw.com/dksih/QBM/2019/5/25/2211184924065792/2211461125693440/STEM/16669435d196442ca43a4ec3d54062e6.png?resizew=322)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
【推荐1】已知二次函数
.
(1)求它的对称轴与
轴交点D的坐标;
(2)将该抛物线沿它的对称轴向上平移,如图所示,设平移后的抛物线的顶点为
,与
轴、
轴的交点分别为A、B、C三点,连结AC、BC,若∠ACB=90°.
①求此时抛物线的解析式;
②以AB为直径作圆,试判断直线CM与此圆的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7035221063190432516a7d877684c2.png)
(1)求它的对称轴与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)将该抛物线沿它的对称轴向上平移,如图所示,设平移后的抛物线的顶点为
![](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/d053b14c8588eee2acbbe44fc37a6886.png)
①求此时抛物线的解析式;
②以AB为直径作圆,试判断直线CM与此圆的位置关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2012/2/26/1573348227661824/1573348288159744/STEM/2cbf80fd76cb4a53befecab42b504d62.png?resizew=320)
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真题
【推荐2】如图,等腰
内接于
,
,
是边
上的中线,过点
作
的平行线交
的延长线于点
,
交
于点
,连接
.
为
的切线;
(2)若
的半径为
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae55c291edfea52960e77a0593a7f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在
中,
,
,以
为直径的⊙O交
于点D,点M是
边上一点(点M不与点A,B重合),
的延长线交⊙O于点E,
,且交
于点N,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/69b75c62-9b2b-40df-9944-557eeb6825f4.png?resizew=191)
(1)求证:
;
(2)若
,求证:
是等腰直角三角形;
(3)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae14ee16a8016aa47a99b1f2ee24a1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/69b75c62-9b2b-40df-9944-557eeb6825f4.png?resizew=191)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7719aa677cf563cf295b1588eab60d96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64872851e6f9c502cfc3b783149e8bb.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810fee760e06028fb7d37e65db79bfa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048c053ec9544bb287a89322508ca1bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知,在
中,
,
于点D,点M是射线
上一动点(不与C、D重合),连结
,在
下方作
,连结
,使
,
.
(1)如图,当点M在线段
上时,求证:
;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/13214986-fe58-433b-9d9f-75b10b0675e3.png?resizew=154)
(2)如图,
,当点M在线段
的延长线上时,
交射线
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/6a4cd7de-c230-4ce3-8e81-1dc6766f5e2d.png?resizew=147)
①试判断
与
的数量关系和位置关系,并说明理由;
②若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aedc07a13a8363f233c0b9d056b362a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734c685db2c6172203ea3ec6fc626ae5.png)
(1)如图,当点M在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa422f99d6c408c9925894afd20f4c02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/13214986-fe58-433b-9d9f-75b10b0675e3.png?resizew=154)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dab82ddf9aa5133ab3d1aba8527bb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/6a4cd7de-c230-4ce3-8e81-1dc6766f5e2d.png?resizew=147)
①试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4732bc8d79c547fe41937a47604028b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f5c0ea1d3f5dfc518f813049cd13cea.png)
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