You’ve got the 2 essential information you will need, the centre plus the radius, therefore just form up the equation.
Small variation of the question that is previous rather than providing you the radius, they provide you with the centre and another point on the group. Not so difficult, simply utilize Distance formula to search for the form and radius up the equation.
Another variation of this past question. This time they only provide you with the two points that the diameter passes through. So you shall need certainly to figure out the centre and the radius your self.