1 . 下列说法正确的有( )
A.若一个扇形弧长的值与面积的值都是5,则这个扇形圆心角的大小是![]() |
B.已知![]() ![]() |
C.函数![]() |
D.若幂函数![]() ![]() ![]() |
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2 . 下列说法中正确的是( )
A.![]() |
B.第一象限角都是锐角 |
C.在半径为2的圆中,![]() ![]() |
D.终边在直线![]() ![]() |
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3 . 折扇是我国传统文化的延续,它常为字画的载体,深受人们的喜爱,如图1所示.图2是某折扇的结构简化图,若
厘米,弧
和弧
的长度之和为40厘米,则该扇形环面(由扇形
挖去扇形
后构成)的面积是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/b434b038-68aa-4bd4-8f0c-6c2882934b1b.png?resizew=326)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630b9ca3d20635161fa8fbf812b9128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d5fed6f61cf33e780586ad8e3234ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa16146cb21f11693feffb0876c0795b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/b434b038-68aa-4bd4-8f0c-6c2882934b1b.png?resizew=326)
A.300平方厘米 | B.320平方厘米 | C.400平方厘米 | D.480平方厘米 |
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4 . 下列说法正确的是( )
A.圆心角为![]() ![]() ![]() |
B.命题“![]() ![]() ![]() ![]() |
C.![]() |
D.函数![]() ![]() |
您最近一年使用:0次
名校
5 . 如图是杭州第19届亚运会的会徽“潮涌”,将其视为一扇面
,若
的长为
的长为
,则扇面
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927c859db07bdbe0c2d0b11525acde5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f16a0f4c6b76b91f835293d2b6e116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/61163d7f-c92a-4c0a-a0ac-80584daa83b3.jpg?resizew=109)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/b8ad2628-6a4f-4f64-ab42-023b4f188516.png?resizew=172)
A.190 | B.192 | C.380 | D.384 |
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6 . “扇形窗下清风徐”.如图所示是一个扇子形窗,其所在的扇形半径为
,圆心角为
,窗子左右两边的边框长度都为
,则该窗的面积约为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/5473f5c3-9827-4770-b16d-e804683b2da1.png?resizew=157)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84755b560534a4cab0c57e1a31cb656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9871f2a312aaf3a19b40e4fb1a7693b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/5473f5c3-9827-4770-b16d-e804683b2da1.png?resizew=157)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 可以用尺规作图画出正五角星,作法如下:以任意一点为圆心,以1为半径画圆
,在圆
内作互相垂直的直径
和
.取线段
的中点
,以
为圆心,以
为半径作弧,交
于
.以
为圆心,以
为半径在圆
上依次截取相等的圆弧,连接
,
,
,
,
,得到如图所示的正五角星,则图中扇形
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.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/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9d2abf13c2842f58654abf73c6b4ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c577750ba9495f65883c24d0cf1cf2a1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/83651a85-07a6-49b9-bf4a-b3a58420a8f8.png?resizew=164)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 如图,在扇形
中,
,
,则下列说法正确的个数是( )
; ②
的长等于
;
③扇形
的周长为
; ④扇形
的面积为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc790cfaa59a808c25a7edb95dc29fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50bf7d7fa347c09dedde116bb787a3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6131160eaee962470abc7771df265c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
③扇形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8acaf07b6bd091c5cde1e88df4c259a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67fb457e8ac0d3ac35e1c668ea138f91.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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解题方法
9 . 下列说法正确的是( )
A.某扇形的半径为2,圆心角的弧度数为![]() ![]() |
B.已知函数![]() ![]() ![]() |
C.“![]() ![]() |
D.函数![]() |
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10 . 如图,这是某公园的一条扇形闭合路
,其中弧
所对的圆心角为2.4,
,则这条扇形闭合路的总长度为__________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e11402c6ef570664e353d614a69781f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/484b1cf0-349c-443d-9279-66b13c859139.png?resizew=177)
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