Posted by megan on .
the endpoints of the diameter of circle O are (2,1) and (16,13). what are the coordinates of its center?

geometry 
Reiny,
The centre will be the midpoint of your two given points
for x of midpoint: (2+(16))/2 = 9
for y of midpoint : (1 + 13)/2 = 6
the centre is (9,6)