已知直线
,点E和点F分别在直线
和
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/49bd638b-7cbe-4677-a59b-4a8285b9d61b.png?resizew=455)
(1)如图1,射线
平分
交
于点G,若
,求
的度数;
(2)如图2,射线
平分
,点M是射线
上一点(不包括端点F),点N为
的平分线上一点(不包括端点E),连结
,
,延长
交射线
于点H,猜想
与
的关系,并说明理由;
(3)在(1)的条件下,若
绕点G以每秒转动
的速度逆时针旋转一周,同时
绕点F以每秒转动
的速度逆时针旋转,设转动时间为t秒,当
转动结束时
也随即停止转动,在整个转动过程中,当
和
互相平行时,请直接写出此时t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/49bd638b-7cbe-4677-a59b-4a8285b9d61b.png?resizew=455)
(1)如图1,射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7652fd5598a9eaa011726784cae56bc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab07e7694d04bc1733c55334ff538f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7d6902c8862bd2616be038549f77aff.png)
(2)如图2,射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f68e4414c9ab464bf433385c03705f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b59874dae8b394a4e434aa3875708a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4410f982bf334fa726c417ee1d6554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd9360d1288b33a4d556fbb0a0bed57.png)
(3)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9b798a71ae94839e1ebb0a644202e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc63679c80e6bd24f3a27763d545dcdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1653dd6d530c2e15ef1f073760ae5ad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9b798a71ae94839e1ebb0a644202e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9b798a71ae94839e1ebb0a644202e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
更新时间:2024-02-27 10:15:21
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,直线
相与
相交于O,
分别是
,
平分线.
的两个补角;
(2)若
.求
和
的度数;
(3)试问射线
与
之间有什么特殊的位置关系?为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5faca03dd3d2b7cc37f4c7c3aad7783e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8e171ac85cbccc8223a0cb5bc8bde3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2557547eecdc826b8282058802d217.png)
(3)试问射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,AB为⊙O的直径,点C,D在⊙O上,且CD平分∠ACB,点E在CA延长线上.
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595455775105024/2598468529438720/STEM/00b0335acb6d4efaae96817b9a217f19.png?resizew=278)
(1)若∠ABC=55°,求∠EAD的度数;
(2)若AD=
,BC=6,求AC的长.
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595455775105024/2598468529438720/STEM/00b0335acb6d4efaae96817b9a217f19.png?resizew=278)
(1)若∠ABC=55°,求∠EAD的度数;
(2)若AD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa82a15632a545ce2cc6dc998899807.png)
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名校
【推荐1】如图,
内有一点
,根据下列语句画图和回答:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/98369898-143b-4100-9ea4-b81f3404b3fc.png?resizew=165)
(1)过点
画
的垂线段,垂足为
;
(2)过点
画线段
交
于点
,画直线
交
于点
;
(3)如果
,那么
______°,
______°.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/98369898-143b-4100-9ea4-b81f3404b3fc.png?resizew=165)
(1)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3092491df4c5e4989d0d9827df97ee55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dab31b672ae7c8dbe71f236a0dfe01c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d134517e1554afdb0e0dbdaecd80862b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e626917473d8b13f2ad2553e102d7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec04e72f5454ce43375422d03c7e0a5.png)
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解答题-证明题
|
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名校
【推荐2】【感知】如图①,若
,
平分
,求证:
.
请将下列证明过程补充完整:
证明:∵
平分
,(已知),
∴
___________(角平分线的定义),
∵
(已知),∴
___________(两直线平行,内错角相等)
∴
(等量代换).
【探索】如图②,
平分
,
,点
在射线
上,点
在线段
上,若
,求证:
.
【拓展】如图③,将【探索】中的点
移动到线段
的延长线上,其他条件不变,若
,请直接写出
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f84c25fd724f2a4d3b4603274e71acb.png)
请将下列证明过程补充完整:
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1754d9d6cbbb7f2ea49c86ac236167.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de25d460b85d08185093ca0769415a9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f84c25fd724f2a4d3b4603274e71acb.png)
【探索】如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f84c25fd724f2a4d3b4603274e71acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ebd1c1128b9bbed60211accedad7f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a24ee04b7e461c045431ce83d15a91de.png)
【拓展】如图③,将【探索】中的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18dcfb798fbc5ef5265836401826dd7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ea8be9535f942121f6f6d873d03272.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,将一块直角三角板
绕着
角的顶点B顺时针旋转,使得点A与
延长线上的点E重合,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/e05d1297-af06-4e2c-97d4-a425c6793d0a.png?resizew=226)
(1)三角板旋转了______度,
的形状是______;
(2)求
的度数;
(3)若
,求旋转过程中点A经过的路程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf468f5132e14ee1d8cc766808b11af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/e05d1297-af06-4e2c-97d4-a425c6793d0a.png?resizew=226)
(1)三角板旋转了______度,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
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名校
【推荐2】在
和
中,
,
,
,用这两个直角三角形研究图形的变换.
(1)如图1,将
沿线段
翻折,连接
,下列对所得四边形
的说法正确的是______.
①
平分
、
,②
、
互相平分,③
,④
、
、
、
四点共圆.
【平移】
(2)如图2,将
沿线段
向右平移,使
点移到
的中点,连接
、
、
,请猜想四边形
的形状,并说明理由.
【旋转】
(3)如图3,将
绕点
逆时针方向旋转,使
,连接
、
,则旋转角为______°,
______cm.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73fbc2f33d3402cd96a776a376d9835.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3583715945d0dc645aee9aa778ab252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45fbc42ea04e6ae3b868f218785c9bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8086e5521c613f6438322463290ccc0c.png)
(1)如图1,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a31c3a9dc3437c6309cec6486ce42c94.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d59511c474942171fb685fc3f8dfd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db0641078052bf1af17b4c5a01b9ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ae35bb97556d2967f5364b99f404d5.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
【平移】
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54f59859698f3cfdfe285b3cdb95125.png)
【旋转】
(3)如图3,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca055fd598566ffc1cbae35b92f68f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ff731a6624a093d2b33f1314845afe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
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