Circle theroms

• Alternate segment:

  The angle that lies between a tangent and a chord is equal to the angle subtended by the same chord in the alternate segment
• Angles at the centre:

  the angle at the centre is twice the angle at the circumference
• Angles In a semicircle: 


  Angles in a semi circle is 90 degrees
• Angles in the same segment:

  The angles in the same segment are equal
• Chord of a circle:

  perpendicular from the centre of a circle to a chord bisects the chord.(splits the chord into equal parts)
• Cyclical quadrilateral:

  The opposite angle in a cyclical quadrilateral =180
• Tangent of a circle:

  Angle between a tangent and radius is 90 degrees
• Tangent of a circle:

  Tangent which meets at the same point are equal In length