Radius Perpendicular Bisector of Chord

Click and drag point B to change the radius. Does changing the radius affect the length of the chord XY? If so, explain the changes.
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Click and drag point M. Does changing the point of intersection affect the length of the chord? If so, explain the changes.
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Auto
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• Unordered list
1. Ordered list
Quote [ctrl+shift+3]
[code]Code [ctrl+shift+4]
Insert table
Remove Format
Insert image [ctrl+shift+1]
Insert icons of GeoGebra tools
[bbcode]
Text tools
Insert Math
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Information: Radius Perpendicular Bisector of Chord