David Cheung – Resources – GeoGebra

Tangent intersecting extended chord
Activity
David Cheung
Circle Theorems for CIE IGCSE Mathematics
Book
David Cheung
Chords intersecting outside the circle
Activity
David Cheung
Chords intersecting inside the circle
Activity
David Cheung
External tangents from a point outside the circle
Activity
David Cheung
Perpendicular bisector of a chord
Activity
David Cheung
Angle at the centre and angle at the circumference
Activity
David Cheung
Angles in alternate segments
Activity
David Cheung
Angles in alternate segments
Activity
David Cheung
Distance of equal chords from the centre
Activity
David Cheung
Angles in opposite segments
Activity
David Cheung
Opposite angles in a cyclic quadrilateral
Activity
David Cheung
Angles in the same segment
Activity
David Cheung
Angle between tangent and radius
Activity
David Cheung
Angles in a semi-circle
Activity
David Cheung