line l bisects XY at M and divides XY into two equal parts name a pair of congruent segments
must be XM and MY
A pair of congruent segments formed by line l bisecting XY at M and dividing XY into two equal parts is MX and MY.
To name a pair of congruent segments, we need to identify two segments that have the same length. In this case, line l bisects XY at M, meaning it divides XY into two equal parts.
Let's call the left portion of XY as XM and the right portion as MY. Since line l bisects XY, XM and MY are the two segments that we can name as congruent segments.
Therefore, XM is congruent to MY.