Since segment AC is the perpendicular bisector of segment BD and they meet at point E, the following properties can be inferred:
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Perpendicular Bisector Definition: As a perpendicular bisector, AC not only bisects segment BD into two equal parts at point E but also forms right angles (90 degrees) with segment BD at that point.
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Segment Lengths: Since AC bisects BD at point E, we can conclude that \( BE = ED \). Because E is the midpoint of BD.
Therefore, the true statement about segment \( BE \) is:
It must be the same length as segment DE.
Thus, we can select the option: It must be the same length as segment DE.