Important formula of Circles and Tangents
- Equal chords of a circle are equidistant from the centre .( Chord Property)
- The perpendicular drawn from the centre of a circle, bisects the chord of the circle. (Chord Property)
- The angle subtended at the centre by an arc= Double the angle at any part of the circumference of the circle .(Angle Property)
- Angles subtended by the same arc in the same segment are equal.(Angle property)
- To a circle, if a tangent is drawn and a chord is drawn from the point of contact , then angle made between the chord and the tangent = angle made in the alternate segment(Tangent property)
- The sum of opposite angles of a cyclic quadrilateral is always 180 degree.
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