Question

maths please answer these questions fast​

Answer 1

Answer:

Step-by-step explanation:

The length of arc l and area A of a sector of angle θ in a circle of radius r are given by,

l=  

360  

o

 

θ

​  

×2πr

and A=  

360  

o

 

θ

​  

×πr  

2

 respectively.

Here, r=21 cm and θ=150  

0

 

∴l=  

360

150

​  

×2×  

7

22

​  

×21=55 cm

and  

A=  

36

150

​  

×  

7

22

​  

×21  

2

=  

2

1155

​  

=577.5 cm  

2