Sir, can you please explain the pentagon question a bit more elaborately. I failed to understand. Reply
Because we have drawn SOR as an equilateral triangle, and SR is known to be 5. Visualise it! regards J Reply
CAT-holics 
Sir, can you please explain the pentagon question a bit more elaborately. I failed to understand.
Hi, is it mentioned as a regular pentagon? How is OS 5, otherwise?
Because we have drawn SOR as an equilateral triangle, and SR is known to be 5. Visualise it!
regards
J