Will rate 5 ! giving lots of ! what is the length of the segment that joins the points: (-2, 3) and (-8, -7)? what is the midpoint of the segment that joins the endpoints (-3, 12) and (-7, -20)? if the diameter of a circle has endpoints at (-2, 4) and (3, 8), what is the length of the radius of the circle? if the endpoints of the diameter of a circle are (-10, 12) and (12, 18), what are the coordinates of the center of the circle?