Math 9: Chord Properties (Part 3 of 3)
Note that line segment AB is perpendicular to chord DE. Move Point B along DE until AB passes through the centre of the circle. What do you notice about DB and BE?
The Rule: The perpendicular bisector of a chord passes through the centre of the circle. The Big Picture: - perpendicular - bisector of chord - through centre of circle if two of these are true then all three are true.