如图,现有一块含有
的直角三角板
,且
,其中
.
和
分别过三角板
的两个顶点时,且
,则
______![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)如图(2),当
时,求
的度数(用含n的代数式表示).
(3)如图(3),点Q是线段
上的一点,当
时,请判断
和
的数量关系,并说出理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1095c036b49c3327baaa2c3c7f746134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b4eb3df08757e2b6c15122a6ca89f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d61cf08cf754bd3acaaa7b9754986b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)如图(2),当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577c87f8cad4fdb9cbae99c8add681e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54c6f5286b3b913e0a2af5fea1f71ba.png)
(3)如图(3),点Q是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304d903aadc46f404c259d94e238118f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb41f3ffbdb61e6b6f11b350d10073d.png)
20-21七年级下·浙江·期末 查看更多[2]
更新时间:2021-07-02 21:23:05
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,直线
,点C是
之间(不在直线
上)的一个动点.
(1)若
与
都是锐角,如图甲,写出
与
之间的数量关系并说明原因;
(2)若把一块三角尺(
)按如图乙方式放置,点D,E,F是三角尺的边与平行线的交点,若
,求
的度数;
(3)将图乙中的三角尺进行适当转动,如图丙,直角顶点C始终在两条平行线之间,点G在线段
上,连接
,且有
,求
与
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7928198bde37727e3a04a7f3e6b306fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be28cdf19cfba73f1a090edd92984b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be28cdf19cfba73f1a090edd92984b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/31/4ac64ca4-72c8-4646-9680-85f49de9a888.png?resizew=483)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d194c4be57c0301ae94b6bd29b6f70b.png)
(2)若把一块三角尺(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2ff254e6ef8d339bdebcfd5c9a796f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c8685bc75adcc7238928e79296ac582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384da7acfefa7c656eaca2df173f0cb6.png)
(3)将图乙中的三角尺进行适当转动,如图丙,直角顶点C始终在两条平行线之间,点G在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f860610b6df16be6832320fc8b0134d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b557fa605f7bde4aa3f721d3f8c57341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384da7acfefa7c656eaca2df173f0cb6.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,等边三角形
的边长为
,点
从点
出发沿
向
运动,点
从
出发沿
的延长线
向右运动,已知点
、
都以每秒
的速度同时开始运动,运动过程中
与
相交于点
,设运动时间为
秒.
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947359065538560/2948644254769152/STEM/96f495f6-ddc9-4b5b-9752-4925252d5fe2.png?resizew=448)
(1)请直接写出
长;
(2)当
为直角三角形时,运动时间为几秒?
(3)求证:在运动过程中,点
始终为线段
的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda801279fca4a8360f43773e4bdf746.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/14b49022a6f55817b5d7e3ab443b5491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b08802c1a4913d713dc6348c63e8a7ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947359065538560/2948644254769152/STEM/96f495f6-ddc9-4b5b-9752-4925252d5fe2.png?resizew=448)
(1)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.png)
(3)求证:在运动过程中,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
和
分别是以
的
、
为一边在形外所作的等边三角形,
与
相交于O.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/30/ef25ef65-bd39-4063-befd-2f2a987d647a.png?resizew=157)
(1)求证:
.
(2)求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fb6e81fee5674c3e26a65e58cc506d.png)
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/30/ef25ef65-bd39-4063-befd-2f2a987d647a.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360ebefca282836247bdbb0d5018879c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2460507a462453e084eaf70a7d867e9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在
中,
为
上一点,
垂直平分
,交
于点
,
垂直平分
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/38776acc-0d15-4c63-9f61-18ed91eabc9b.png?resizew=166)
(1)若
,求
的度数;
(2)若
的周长为
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/38776acc-0d15-4c63-9f61-18ed91eabc9b.png?resizew=166)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fb900d14718e4a47eb9d8a17b0dd8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e8f6faf46c448fe8d838fde1af495b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76052061e31bfe2adae7e66ab2537d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f698e34e03c4a0c041bce4cc34164d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,
,将
绕点B顺时针旋转
得到
,且点C在
上,求旋转角(
)的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e702e136211878dce558e0457f15df63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c3df08105e6eeebf093885a093cc43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83e447f53d3b3a2914940bf2df3da52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/1b869f63-1a87-4eaf-a5ae-10f30acd46d3.png?resizew=176)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,已知正方形
中,
为
上一点,把
绕
点顺时针旋转
,
与
重合,
与
延长线上的
点重合,延长
交
于
点,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/b929a31d169a811004f0ecd6b7984e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ff7caec4fdd8fb54a3ffbff9692414.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/a0ed1ec316bc54c37c4286c208f55667.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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6813488bd1ea40a3aa5e2cb3be7bf312.png)
![](https://img.xkw.com/dksih/QBM/2019/10/23/2318114004099072/2318188564955136/STEM/5b5c94c539bc4322aef92b7b8c781e8f.png?resizew=141)
您最近一年使用:0次