- S5 geometryAngle in the same segmentAngle at centre is twice the angle at the circumference v2Angle in the semi circlePerpendicular bisector of a chord passes through the centre.Equal chords are equidistant from the centre of the circleCongruent Chords and their Central AnglesAng in the opps segment.Exterior angle of a cyclic quadrilateralConverse of angle in alternate segmentAngle between tangents from external point
