S4 Properties of Circle

Kawa Chan, 29. 2. 2016


  • 1. Angle at centre twice angle at circumference
  • 2. Angles in the same segment
  • 3. Perpendicular from centre to chord bisects chord
  • 4. Equal chords, equal arcs
  • 5. Chords equidistant from centre are equal
  • 6. Test for cyclic quadrilateral
  • 7. Opposite angles, cyclic quadrilateral
  • 8. Arcs proportional to angles at centre
  • 9. Arcs proportional to angles at circumference
  • 10. Angle in alternate segment
  • 11. Converse of Tangent perpendicular to radius
  • 12. Converse of angle in alternate segment

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Angle at centre twice angle at circumference

Angle at centre twice angle at circumference
– mcdull

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Informace