Since line segment AC is a perpendicular bisector of segment BD, it means that:
- Perpendicular: Segment AC intersects segment BD at point E at a right angle (90 degrees).
- Bisector: Point E divides segment BD into two equal parts.
Therefore, we can conclude that segment BE is equal in length to segment ED. In other words:
\[ BE = ED \]
This means that segment BE is half of segment BD and represents an equal division of the length of segment BD at point E.