how to do this , like i have added their formual in order to find the radius but i cant solve it cause i need to get the fitta, ? anyone can show me ?

[Harry_the_cat]

Yes that's right So what is r?

 

[dev644]

I got

Equal the given perimeter to the formula to get the radius, isn't it?

I got a round up 12 cm which is the right solution , truly thanks you so,
So much for taking the time Harry_the_cat

 

[Harry_the_cat]

Good work!