Parts of a Circle
Radius, Diameter, Circumference
Radii & Sectors
Chords & Segments
Tangents
Symmetry Properties of Circle
Perpendicular Bisector of Chord
Equal Chords & Perpendicular Bisectors
Tangents from a point & angle between them.
Angle Properties of Circle
Angle at the center & angle at the circumference
Angle inside same segment
Angle inside a semicircle
Opposite angles of a cyclic quadrilateral
Angle between radius and tangent