1 . 如图所示,将一个半径
,圆心角
的扇形纸板放置在水平面的一条射线
上,在没有滑动的情况下,将扇形
沿射线
翻滚至
再次回到
上时,
运动的路线长为__________
.(计算结果不取近似值)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae1859ae3035da683f926f3d7ddf9bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f05d0ebdc824907a12cd725d1b3011.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/53ebc70a-cabb-4af9-b88e-b942e11e6f3b.png?resizew=363)
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2 . 将一副三角尺按如图所示的方式摆放,则
的大小为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/426e0912-dce2-410c-9a8b-7ded1a27e0de.png?resizew=186)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/426e0912-dce2-410c-9a8b-7ded1a27e0de.png?resizew=186)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知:如图,一次函数的图象与反比例函数的图象交于
两点,与
轴正半轴交于点
,与
轴负半轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/69df1a9f-7667-4af0-a9bf-563fe150edb7.png?resizew=176)
(1)求反比例函数的解析式;
(2)当
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c25b1fd10831f3aed13a862aa93e24.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/69df1a9f-7667-4af0-a9bf-563fe150edb7.png?resizew=176)
(1)求反比例函数的解析式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc27da9d3158ea1caeaac45618a09b2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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4 . 如图,在Rt
中,
平分
交
于点
为
上一点,经过点
的
分别交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/5f6dc370-6dbc-4580-a2dc-6fbb6c4796ce.png?resizew=153)
(1)求证:
是
的切线;
(2)若
,求
的半径;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dbfec790ed848aa4f51dca80b2d4919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ed5ea3e7db5a6943f2915d32339709c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4ee159aea403220848b14b8e81dc20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adaa82a6500e3a95a24168f7df243790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ae536809b1161fd4e83fdc7f42be96.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/5f6dc370-6dbc-4580-a2dc-6fbb6c4796ce.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881f21399c7da4e1761450e88ccb19c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e6dfdb4e5049440c2ad0ec5eed5f63.png)
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5 . 2020年初以来,红星消毒液公司生产的消毒液在库存量为
吨的情况下,日销售量与产量持平.自1月底抗击“新冠病毒”以来,消毒液需求量猛增,该厂在生产能力不变的情况下,消毒液一度脱销,下面表示2020年初至脱销期间,该厂库存量
(吨)与时间
(天)之间函数关系的大致图象是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
6 . 如图,已知直线
,直线
和点
,过点
作
轴的平行线交直线
于点
,过点
作
轴的平行线交直线
于点
,过点
作
轴的平行线交直线
于点
,过点
作
轴的平行线交直线
于点
,按此作法进行下去,则点
的横坐标为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491777db8ebc6566107f8dcb0a84494c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad403f5bf2efdead34580a8d8082e2af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f33f27e2c96f019bc9be1ac55e52f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ca4bcbc6268df08d715673fe6e0379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/391d23b5ffaf0444a1d1a1550a0f3527.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/919790b4-72d8-4c41-bcf3-a3a7c2bbdac3.png?resizew=174)
您最近一年使用:0次
7 . 如图,已知
和
都是等腰三角形,
交于点
,连接
.下列结论:①
;②
;③
平分
;④
.其中正确结论的个数有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/65defad3-3bb8-45dc-b686-b2eebb36fdeb.png?resizew=186)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c0b83ea8cb4b97fbafbbcdb9ad49fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a989aa942219970ec11ccd6ab186d69b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545148bc3274300e4a2e23caf38db122.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/65defad3-3bb8-45dc-b686-b2eebb36fdeb.png?resizew=186)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
8 . 如图1,已知
,用尺规作它的角平分线.
如图2,步骤如下,
第一步:以
为圆心,以
为半径画弧,分别交射线
于点
;
第二步:分别以
为圆心,以
为半径画弧,两弧在
内部交于点
;
第三步:画射线
.射线
即为所求.
下列正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/9eec5059-af1a-4e6e-9daa-6115e0cb465b.png?resizew=593)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
如图2,步骤如下,
第一步:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58e08ee0b2580a62cf20f709b5e90df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
第二步:分别以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
第三步:画射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
下列正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/9eec5059-af1a-4e6e-9daa-6115e0cb465b.png?resizew=593)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() |
您最近一年使用:0次
9 . 我国古代数学经典著作《九章算术》中记载了一个“圆材埋壁”的问题:“今有圆材埋在壁中,不知大小.以锯锯之,深一寸,锯道长一尺.问径几何?"意思是:今有一圆柱形木材,埋在墙壁中,不知其大小.用锯去锯这木材,锯口深
寸,锯道长
尺(1尺
寸).问这根圆形木材的直径是__________ 寸.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f392cf697f88fc22678b5d02cbffb94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3c450315612a9fa3fc9562f290bc04.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/3d42c48f-ca3a-497c-91af-57226448659c.png?resizew=175)
您最近一年使用:0次
10 . 如图,将
绕边
的中点
顺时针旋转
.嘉淇发现,旋转后的
与
构成平行四边形,并推理如下:
小明为保证嘉淇的推理更严谨,想在方框中“
”和“
四边形...”之间作补充,下列正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/7300176e-3739-4f16-bd8a-ab8887559912.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e7a123c9cc0e058db28841fb0edcf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf94bbdc11e2942b20368833c7d7a787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
点![]() 而点 ![]() ![]() ![]() ![]() ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21510690a3321fec0ff1cf72b1582df1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/7300176e-3739-4f16-bd8a-ab8887559912.png?resizew=162)
A.嘉淇推理严谨,不必补充 |
B.应补充:且![]() |
C.应补充:且![]() ![]() |
D.应补充:且![]() |
您最近一年使用:0次