The endpoints of the diameter of a circle have the coordinates (3, 8) and (9, 16).

what are the coordinates of the center of the circle?

The coordinates of the center of this circle will be the average between the extreme points

C = ( (xo+x1)/2 , (yo+y1)/2)

Where,

xo = 3 and x1 = 9

yo = 8 and y1 = 16

Then us stay with"

C = ( (3+9)/2 , (8+16)/2)

C = ( 12/2 , 24/2)

C = ( 6 , 12 )