初二忠圆与扇形

初二忠圆与扇形

9th Grade

10 Qs

quiz-placeholder

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初二忠圆与扇形

初二忠圆与扇形

Assessment

Quiz

Mathematics

9th Grade

Medium

CCSS
HSG.C.B.5

Standards-aligned

Created by

You Chuah

Used 55+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

若一个扇形的圆心角是45°,面积为2л,则这个扇形的半径是_____。

2

4

6

8

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

已知一圆的面积为 36π cm2cm^2  ,求其半径。

 36\sqrt{36}  

18

6

64

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

穿过圆心且其两端点皆在圆周上的线段称为_____。

半径

平行线

直径

水平线

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

圆的直径为半径的_____倍

1

2

3

4

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

一圆的半径为 7m,求此圆的面积。(π = 227\frac{22}{7}  )

144

44

22

154

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

扇形的弧的长与其所对的_____成正比。

圆周率

半径

圆心角

直径

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

一扇形的圆心角增大,则其弧长_____。

增长

减短

不变

不清楚

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