english: If you know the circumference of a circle, and you have two points on it, all you need to know is the distance between those two points, and you can extrapolate the circumference.
non_english: Sad, ako znate obim kruga i imate dve tačke na njemu, sve što treba da znate je  razmak izmedju te dve tačke i možete da izvedete obim.