圆的周长和面积

圆的周长和面积

8th Grade

10 Qs

quiz-placeholder

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圆的周长和面积

圆的周长和面积

Assessment

Quiz

Mathematics

8th Grade

Hard

Created by

J3L00 黄世基NG

Used 5+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

一圆的直径是 312 cm3\frac{1}{2}\ cm 单位,那么半径是多少公分? 

 3 cm3\ cm  

 74 cm\frac{7}{4}\ cm  

 114 cm1\frac{1}{4}\ cm  

 314 cm3\frac{1}{4}\ cm  

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

一圆的半径为5单位,那么此圆的周长是多少?

10π10\pi

25π25\pi

20π20\pi

50π50\pi

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

一圆的周长为 15π15\pi  ,则此圆的半径为多少单位?

 1515 

 7.57.5 

 3.753.75 

 15\sqrt{15}  

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

一圆的直径为10单位,则此圆的面积为多少平方单位?

2.5π2.5\pi

5π5\pi

10π10\pi

25π25\pi

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

一圆的周长为 12π cm12\pi\ cm^{ }  ,那么其面积为多少平方公分?

 288π288\pi 

 144π144\pi 

 72π72\pi 

 36π36\pi 

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

一圆的面积为 49π cm249\pi\ cm^2  ,那么其周长为多少公分?

 7π7\pi 

 72 π7\sqrt{2}\ \pi 

 14π14\pi 

 27 π2\sqrt{7}\ \pi 

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

如图所示,若线段AOB长6 cm,则此图形的周长为多少公分?

 6π cm6\pi\ cm  

 (6π+6)cm\left(6\pi+6\right)cm  

 3π cm3\pi\ cm  

 (3π+6) cm\left(3\pi+6\right)\ cm  

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