Overview
Syllabus
Finding the Centre of a Circle Passing Through 3 Points.
Tangent & Radius are Perpendicular (Demonstration Through Secants).
Components of a Circle.
Angle Properties in a Circle.
Cyclic Quadrilateral Properties.
Angle in the Alternate Segment Theorem.
Circle Geometry Question (Using Theorem Converses).
HSC Wk6 Quiz Overview (Solving A Harder Circle Geometry Question).
HSC Circle Geometry Question (1 of 3: Similar Triangles).
HSC Circle Geometry Question (2 of 3: Intermediate Length).
HSC Circle Geometry Question (3 of 3: Finding Radius).
Chord Properties (Circle Geometry).
Components of a Circle.
Angle Properties - Circle Geometry (Angle at the centre/circumference).
Angle Properties - Circle Geometry (Angle in a semicircle).
Angle Properties - Circle Geometry (Second proof of angle at the centre/circumference).
Angle Properties - Circle Geometry (Angles in the same segment).
Tangent Properties - Circle Geometry (Tangent is perpendicular to radius).
Tangent Properties - Circle Geometry (Tangents from an external point are equal).
Angle in the Alternate Segment - Circle Geometry (1 of 3: Setup).
Angle in the Alternate Segment - Circle Geometry (2 of 3: Proof).
Angle in the Alternate Segment - Circle Geometry (3 of 3: Conclusion and overall summary).
Intercept Properties - Circle Geometry (1 of 3: Intersecting chords).
Intercept Properties - Circle Geometry (2 of 3: Secants from a point).
Intercept Properties - Circle Geometry (3 of 3: Tangent & secant).
Tough Circle Geometry Question (1 of 3: Finding & using congruent triangles).
Tough Circle Geometry Question (2 of 3: Proving a given chord is a diameter).
Tough Circle Geometry Question (3 of 3: Using tangent properties).
Congruent Triangles in Circles (1 of 2: Equal chords).
Congruent Triangles in Circles (2 of 2: Chord bisector).
Opposite Angles in a Cyclic Quadrilateral (1 of 2: Introduction).
Opposite Angles in a Cyclic Quadrilateral (2 of 2: Completing the proof).
Tough Circle Geometry Question (1 of 2: Set up & initial arguments).
Tough Circle Geometry Question (2 of 2: Proving points collinear).
Equal Overlapping Circles Question (1 of 2: Identifying congruent triangles).
Equal Overlapping Circles Question (2 of 2: Finding equal lengths).
Tangents of Circles (1 of 4: What are they?).
Tangents of Circles (2 of 4: Tangent perpendicular to radius).
Tangents of Circles (3 of 4: Tangents from an external point).
Tangents of Circles (4 of 4: Angle in the alternate segment).
Proof: Centres & point of contact are collinear on touching circles.
Circle Geometry Proof - Triangles & Tangents.
Circle Geometry Proof (Touching circles with a second common tangent).
Circle Geometry Example Question (worked proof).
Taught by
Eddie Woo