Math, asked by jazibjalil, 7 months ago

2. The radius of the circle is 21 cm. Find
a circumferences of the circle
b area of the circle (Pi= 22127)




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Answers

Answered by acutexeng1
0

Answer:

Radius of a circle, r = 21 cm

Perimeter of a quadrant, P=(  

2

π

​  

+2)r units

=(  

7×2

22

​  

+2)×21=(  

14

22

​  

+2)×21

P=(  

14

22+28

​  

)×21=  

14

50

​  

×21

=75cm.

Area of a quadrant, A=  

4

πr  

2

 

​  

 sq. units

A=  

7 /

22

​  

×  

4

21×21

​  

 

=346.5cm  

Answered by shrutirajput434
8

Step-by-step explanation:

circumference=2πr

=2×22/7×21

=132

area=πr^2

=22/7×21×21

=1386

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