Air casan a 'cuideachadh dhut obrachadh a-mach an equation of the circle aig trì a thoirt points agus a' lorg co-chomharran de 's point agus tha radius a' chearcaill.
The equation of the circle tha:
r2 = (x — cmsu)2 + (y — k)2.
Far a bheil (cmsu,k a tha co-chomharran na mheadhan na circle), (x,y — coordinates of the points of a circle), (r — radius).