如图,在矩形
中,
于点
,交
于点
,过点
作
的角平分线交
于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/6c5ae567-9a9b-4484-9247-1896c857fb5e.jpg?resizew=134)
(1)求证:
;
(2)求
;
(3)若
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90026b96116424a245b335b1adb886b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0d1fbb0d855b9c7f84850bca5bbb56.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/6c5ae567-9a9b-4484-9247-1896c857fb5e.jpg?resizew=134)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922c701f4f25d06bbdcf360b40ee9693.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67868a097fc9997cfc7fbbbfb7dcb2d3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49437f474e5805688dff21ded2d1fd7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6240d4cf0fb44aa1e6bdaf2a4bdfb37e.png)
更新时间:2024-04-08 09:50:20
|
相似题推荐
解答题-问答题
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【推荐1】如图,在
中,
,
,
,若动点P从点C开始出发,按
的路径运动,且速度为每秒
,设出发的时间为t秒.
(1)填空:
;
(2)若点P恰好在
的角平分线上,求t的值;
(3)当t为何值时,
为等腰三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cd4a1c8087ef697d82b321a3331211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba5ca8ae34ecf31ebdea3c091d356b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/c2ece2ff-3e7c-4294-935a-68de024d4439.png?resizew=97)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fee66473d37ebc627940f83d0574d15.png)
(2)若点P恰好在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(3)当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
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【推荐2】如图1,在
中,
,点P从点A出发,以每秒1个单位长度的速度沿路线
运动.设点P的运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/f38a2811-9bd0-41b1-a6c5-97371a31210c.png?resizew=742)
(1)
_________;当点P在
上时,
_________(用含t的代数式表示);
(2)如图2,若点P在
的角平分线上,求t的值;
(3)在整个运动过程中,当
是等腰三角形时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3755b855978d2df812eae501bf48039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e06dc307ebab89176dd5e32d295d6c6f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/f38a2811-9bd0-41b1-a6c5-97371a31210c.png?resizew=742)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc2ddabf078c1b683b067eb1aee1969.png)
(2)如图2,若点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(3)在整个运动过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
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【推荐1】如图,D、E、F是Rt△ABC三边上的点,且四边形CDEF为矩形,BC=6,
.
![](https://img.xkw.com/dksih/QBM/2022/4/6/2952388087947264/2957785547882496/STEM/b9dcdfaa-9ebf-4b85-b8c7-92d04536e921.png?resizew=172)
(1)求AB的长;
(2)设
,则DE=______.EF=______(用含x的表达式表示).
(3)求矩形CDEF的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://img.xkw.com/dksih/QBM/2022/4/6/2952388087947264/2957785547882496/STEM/b9dcdfaa-9ebf-4b85-b8c7-92d04536e921.png?resizew=172)
(1)求AB的长;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c30f73c718bde8352055a14987fc15.png)
(3)求矩形CDEF的面积的最大值.
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【推荐2】综合与实践
问题情境:
在综合与实践课上,老师让同学们利用准备好的两个矩形纸片进行探究活动.
智慧小组准备了两张矩形纸片
和
,其中
,将它们按如图
所示的方式放置,点
落在
上,点
落在
的延长线上,连接
和
.
观察发现:
(1)如图
连接
,则
和
的位置关系是__________,
___________.
操作探究:
(2)如图
,将矩形
绕点
按顺时针方向旋转
(
),试探究(1)中
和
的数量关系是否仍然成立,并说明理由.
拓展延伸:
(3)在矩形
旋转的过程中,当
三点共线时,直接写出线段
的长.
问题情境:
在综合与实践课上,老师让同学们利用准备好的两个矩形纸片进行探究活动.
智慧小组准备了两张矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0023cfe7439214b85673c012d79e6ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
观察发现:
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2231411fc95eb7ca97137005021cd82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0e29aeae6487bc74a051800b8d178fe.png)
操作探究:
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932155523399fccad87f6c3a2ce457a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
拓展延伸:
(3)在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c58d84015edbaee102d720c137668ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
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【推荐1】如图,AB是⊙O的直径,点C是圆上异于A,B的点,连接线段AC和BC,点D在AB的延长线上,且∠BCD=∠BAC,过点A作AE⊥CD于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/63dc5893-c016-4b3e-82b4-5ecf7b9c3ca3.png?resizew=233)
(1)求证CD是⊙O的切线;
(2)若
,AE=4,求BD的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/21/63dc5893-c016-4b3e-82b4-5ecf7b9c3ca3.png?resizew=233)
(1)求证CD是⊙O的切线;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a43b89c4063f8e21a8c7c85955eddb.png)
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名校
【推荐2】如图,平行四边形
中,
于
,
,
,经过点
作圆
和
边切于
点(
点可与点
、
重合),分别交
边,
边于点
,
.
![](https://img.xkw.com/dksih/QBM/2023/6/10/3256741463318528/3258229406425088/STEM/54f05e15bc2c49468fb79483999cdb46.png?resizew=554)
(1)计算
的长;
(2)当点
在边
上,求
的长;
(3)嘉琪说:“若点
与点
重合,则点
一定在圆
上”.你觉得嘉琪的判断对吗?请说明理由;
(4)设圆
的半径为
,直接写出
的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6beb17d468d0e90f9c08a8dbbc05541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2023/6/10/3256741463318528/3258229406425088/STEM/54f05e15bc2c49468fb79483999cdb46.png?resizew=554)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)嘉琪说:“若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/1dde8112e8eb968fd042418dd632759e.png)
(4)设圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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【推荐3】如图,在平面直角坐标系中,直线y=﹣
x+3与y轴交于点A,与x轴交于点B,抛物线y=﹣
x2+bx+c经过点A和点B,过点A作AC⊥AB交抛物线于点C,过点C作CD⊥y轴于点D,点E在线段AC上,连接ED,且ED=EC,连接EB交y轴于点F.
(1)求抛物线的表达式;
(2)求点C的坐标;
(3)若点G在直线AB上,连接FG,当∠AGF=∠AFB时,直接写出线段AG的长;
(4)在(3)的条件下,点H在线段ED上,点P在平面内,当△PAG≌△PDH时,直接写出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a588f736ab1dfe5f606c681d64ea1b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/09227df4-6e3b-4742-ae86-4ade7928cf04.png?resizew=400)
(1)求抛物线的表达式;
(2)求点C的坐标;
(3)若点G在直线AB上,连接FG,当∠AGF=∠AFB时,直接写出线段AG的长;
(4)在(3)的条件下,点H在线段ED上,点P在平面内,当△PAG≌△PDH时,直接写出点P的坐标.
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名校
【推荐1】如图1,菱形
边长为3,延长
至点C,使得
.连接
,
.点E,F分别在线段
和
上,且满足
,连接
,
交于点O,过点B作
,交
延长线于点M,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/cd3689c5-c174-49a7-9bf4-cff9c8666863.png?resizew=482)
(1)求
与
之间的数量关系;
(2)当
时,求
的长度;
(3)如图2,过点M作
交
于N,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf82c9e51bf38d5ff16fc160dd620947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e46fb91464159b80eab7c28a926b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f50a20af37871984415671fc2a2ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/cd3689c5-c174-49a7-9bf4-cff9c8666863.png?resizew=482)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5140df378b339e3a1f8388211b64ec9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
(3)如图2,过点M作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab384f2520d76ed8fa01b31e09c1eea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7257b25ee15cdb509fb4a9e84113c843.png)
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解答题-证明题
|
较难
(0.4)
名校
【推荐2】如图,已知O是
边
上的一点,以O为圆心、
为半径的
与边
相切于点D,且
,连接
,交
于点E,连接
并延长,交
于点F.
是
切线;
(2)求证:
;
(3)若
,F是
中点,求
的长.
![](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/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003bc91d8aa3e39db5d4ecc6c8f6f5eb.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/832aac651de4f8b4079802f887f771c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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