OpenStudy (jkbo):

Which is a median of XYZ? https://www.connexus.com/content/media/336756-1142011-83345-AM-103624338.gif a.Az b.BX c.XY d.YZ

OpenStudy (zepp):

A median is a segment that lies a vertex to the midpoint of its opposite side, what do you thing this segment should be in this question?

OpenStudy (zepp):

Example: |dw:1340684900986:dw| The median $$A \delta$$ is the median of triangle ABC, it cut the opposite side of the vertex A into two equal parts.