Question

An arc of a circle of a radius 28cm subtends a right angle at the centre. Find the length of

the arc.​

Answer 1

Answer:

ector (OAPBO) of a circle is given whose

radius(r)=28cm

and central angle (θ)=45  

∘

 

∴ Area of sector (A)=  

360  

∘

 

πr  

2

θ

​  

 

=  

7

22

​  

×  

360  

∘

 

28×28×45  

∘

 

​  

 

⇒ Area of sector =308cm  

2

 is the required area.

solution

Step-by-step explanation: