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3. 9a prove that if a radius bisects a chord of...

# Question: 9a prove that if a radius bisects a chord of...

###### Question details

9a) Prove that if a radius bisects a chord of a circle then the radius is perpendicular to the chord.
b) Prove that if a radius bisects the angle at the centre subtended by the chord, then the radius is perpendicular to the chord.