Below are the tutorials on Circles. All links point videos on the Sipnayan Youtube channel.  The link to the complete Playlist can be found here.

Lesson 1: Introduction to Circles Part 1 – Basic Terms
Lesson 2: Introduction to Circles Part 2 – More Basic Terms
Lesson 3: Proof: If the Radius is Perpendicular to the Chord, it Bisects the Chord
Lesson 4: Proof: If the Radius Bisects the Chord, It is Perpendicular to the Chord
Lesson 5: Radius Perpendicular to a Chord – Exercises

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