如图,在菱形ABCD中,对角线AC,BD相交于点O,且
,
,点M从点B出发,沿着BA方向匀速运动,速度为1cm/s;同时,直线PQ从点D出发,沿着DB方向匀速移动,速度为1cm/s.PQ
AC且分别与AD、BD、DC交于点P、N、Q;当直线PQ停止移动时,点M也停止运动,连接MQ,设运动时间为t(s)(
),请解答下列问题:
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992583942144000/2996123501281280/STEM/61dfefd86ea841838a36bd3dd19b7ac2.png?resizew=478)
(1)用含t的代数式表示DQ.
(2)t为何值时,四边形AMQD是平行四边形?
(3)是否存在t,使得四边形AMQP面积最大?若存在,求出t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafddfd80f69337909f6eac0f0dbfd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1337ce85d29edabcc2fadb9a9cc31ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0fed6f944ef4b07f7e33ca893581fa.png)
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992583942144000/2996123501281280/STEM/61dfefd86ea841838a36bd3dd19b7ac2.png?resizew=478)
(1)用含t的代数式表示DQ.
(2)t为何值时,四边形AMQD是平行四边形?
(3)是否存在t,使得四边形AMQP面积最大?若存在,求出t的值;若不存在,请说明理由.
更新时间:2022-06-07 11:31:46
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相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在平面直角坐标系中,一次函数
的图象与x轴交于点B,与y轴交于点C,抛物线
的图象经过B、C两点,且与x轴的负半轴交于点A.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/a345a724-b2b7-4548-bf22-927c042e5cec.png?resizew=172)
(1)求二次函数的表达式;
(2)若点D在直线BC下方的抛物线上,如图,连接
、
,设四边形
的面积为S,求S的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf8b47c911e0bbe9efaf7a36d6e84f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b740229a24e2fe9bd2c85147778b2dbd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/a345a724-b2b7-4548-bf22-927c042e5cec.png?resizew=172)
(1)求二次函数的表达式;
(2)若点D在直线BC下方的抛物线上,如图,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c3f982d999937891eec4cb22d62e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aff247954b91c76db5c816977158a971.png)
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【推荐2】如图
,在
中,
,
,
,如果点
由点
出发沿
方向向点
匀速运动,同时点
由点
出发沿
方向向点
匀速运动,它们的速度均为
,连接
,设运动时间为
,解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/94c3df3b-df60-4623-b80c-5306241f0e53.png?resizew=280)
(1)用含
的代数式表示
______,
______;
(2)设
的面积为
,当
为何值时,
取得最大值,
的最大值是多少?
(3)如图
,连接
,将
沿
翻折,得到四边形
,当四边形
是菱形时,求
的值.
![](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/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f9fc63aeaac7f7e359f1bcd734a90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a81d63da32eb9501a0099ee7fd8df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8736fe00b3d7c0ab2524c883df78d0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/94c3df3b-df60-4623-b80c-5306241f0e53.png?resizew=280)
(1)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbc9c4e4db6374d5ba4c5dec8747442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524f25e1eedbfe399f7f42db890ab89a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51ece6bb53c3f5bf2da7d9ee5960e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350e954f629c1901a5cec03558319e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c534c83cd0bd3ca49ad2a83fb17fed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c534c83cd0bd3ca49ad2a83fb17fed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解答题-证明题
|
较难
(0.4)
【推荐1】如图所示,平行四边形
和平行四边形
有公共边
,边
和
在同一条直线上,
且
,过点A作
交
于点G,交
于点H,连接
.
![](https://img.xkw.com/dksih/QBM/2020/12/16/2615494627549184/2617742822948864/STEM/e211fe11-ec7c-4f6d-9349-80d1d57cff64.png?resizew=617)
(1)若
,求
的面积和周长;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf10d92f20501e19d25f6f4159aab89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49cb6392b1f859954303066037c5f5fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4744b427f036dfbc6db68c87cd5c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://img.xkw.com/dksih/QBM/2020/12/16/2615494627549184/2617742822948864/STEM/e211fe11-ec7c-4f6d-9349-80d1d57cff64.png?resizew=617)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3211ec336550ae05d59492f3d676bc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e2aabd852264c3cec32a0b7dec5890.png)
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解题方法
【推荐2】如图,在
中,
,
,
,
是
边上的中点.过点
作
的垂线
,过点
作
的平行线,交
于点
,点
从点
到点
沿
方向匀速运动,速度为2cm/s,同时点
从点
到点
沿
方向匀速运动,速度为1cm/s.连接
,过点
作
于点
,连接
.设运动时间为
,解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/aa464e3c-df1f-4cee-8211-25685f3a4838.png?resizew=315)
(1)当
为何值时,四边形
为平行四边形?
(2)当
为何值时,点
在
的平分线上?
(3)设四边形
的面积为
,写出
与
的函数关系式.
(4)当
关于
的对称点
落在
的延长线上时,
的面积是多少?
![](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/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e48ec323eb922d8f95970689e411021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e73fd2c26616d1da680367b2a197b237.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/aa464e3c-df1f-4cee-8211-25685f3a4838.png?resizew=315)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de04c9d98ff086f2958591ab4beaced.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(3)设四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68d0260fb6cf6ffb9a63ab54f312012.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9bf6bda9363dbef5f6ff4bf6a5edf.png)
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解答题-问答题
|
较难
(0.4)
名校
【推荐1】如图,在四边形
中,
,
,
,
,
,
是
上一点且
,过点
作
,交
延长线于点
,连接
.动点
从点
出发以
的速度沿线段
向终点
匀速运动;同时动点
从点
出发以
的速度沿线段
向终点
匀速运动,过点
作
,交
于点
,交
于点
,当点
到达点
时,点
也停止运动.设运动时间为
,
.解答下列问题:
为何值时,四边形
是平行四边形;
(2)设
的面积为
,求
与
的函数关系式;
(3)在运动过程中,是否存在某一时刻
,使
平分四边形
的面积?
(4)当
为何值时,
为等腰三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee5bd6f04872ef8d3d833d0e2056161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432043f79e122f291c47453013042704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27ae4abe9a90ac25d09482ab9b965a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddb7b201a30f53aefbfb596077cfef5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675bd9a5ea60e2e3c267f7d9e61b152b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d744165d6aad705f64de41a9d931750a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0fed6f944ef4b07f7e33ca893581fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0ddbbe5dbc83cb5f41313a2abb94ac.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129f1d6567bef09b00b7f37894e6dba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb194fd63b75af067ba10dee7471d299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在运动过程中,是否存在某一时刻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b870b1c8c593543e2e0059e3fca9e2.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
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较难
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【推荐2】如图1,在平行四边形
中,
,
,
,M是一动点,从点D出发,沿
运动,以4个单位每秒的速度向终点C点运动;N是从点C出发的另一动点,沿
运动,以2个单位每秒的速度向终点D点运动,点M和点N同时出发,运动时间为t秒(M,N两点中如有一个点到达终点时,所有运动即终止).
为平行四边形,求t;
(2)若
的面积为8,请求出t的值;
(3)如图2,点F是线段
中点,E是直线
上另一动点(位于N点右边),且线段
在移动过程中始终保持长度为2不变,请探究并直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615466d73617e4b8633df3157f6026c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f066c840b2d40393cddce34ee4ed807.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e825de4e5ade72e45a28c8f75b1dea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e8ecb371ce77dca5554e8e03b41386.png)
(3)如图2,点F是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a4210bf6f8ee40af9eceaac1de17b5f.png)
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解答题-证明题
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较难
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【推荐1】在正方形
中,P是射线
上的一个动点,过点C作
于点E,射线
交直线
于点F,连接
.
;
(2)如图1,猜想线段
之间满足的数量关系,并说明理由.
(3)若正方形边长为4,当
时,请直接写出
和
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4398a409532d9a2a7504f91c5be1b93.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deebefa9afcded2e69ec2f8a2e99e2a1.png)
(2)如图1,猜想线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ff605d652bf3a1324a4c6a4c4b0188.png)
(3)若正方形边长为4,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638d9cccb679214718224c3088ed4a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
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解答题-问答题
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(0.4)
名校
【推荐2】【教材呈现】下图是华师版八年级下册数学教材第100页的部分内容.
结合图①,写出解题过程.
【结论应用】如图②,将图①中的△ACD沿AC翻折得到△ACF,点D的对称点为点F,AF分别交BE、BC于点G、H.则
的值为_______,四边形CEGH的周长为_______.
例2 如图19.1.6,在矩形ABCD中,AB=3,BC=4,BE⊥AC,垂足为点E.试求BE的长.![]() |
【结论应用】如图②,将图①中的△ACD沿AC翻折得到△ACF,点D的对称点为点F,AF分别交BE、BC于点G、H.则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/412f4f975713a296f4aa963a7287f5b9.png)
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957149767622656/2958609881415680/STEM/80b1a60b-4c2d-4692-a4c9-e3a239f27195.png?resizew=269)
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