Segment AB has point A located at (5, 4). If the distance from A to B is 7 units, which of the following could be used to calculate the coordinates for point B? 7= square root of (x+5)^2+(y+4)^2
7= square root of (x+4)^2+(y+5)^2
7= square root of (x-4)^2+(y-5)^2
7= square root of (x-5)^2+(y-4)^2

if he does not use open the compass the a width greater than half of po, he will not be able to find the midpoint of the line, without the midpoint of the line, he will not be able to bisect the line.   to find the midpoint of a line the circles drawn with a compass must either intersect or be touching.