Chord bisector goes through the centre Student activity Play

Circle circumscribed about a triangle Animation Play

Circle in the Cartesian coordinate system Whiteboard exercise Play

Circle inscribed into a parallelogram Simulation Play

Circle inscribed into a quadrilateral Student activity Play

Circle inscribed into a square Simulation Play

Circumcircle of a triangle Animation Play

Circumscribed circles, inscribed polygons Animation Play

Circumscribed circles, inscribed polygons Student activity Play

Coding a message Whiteboard exercise Play

Common points of curves Whiteboard exercise Play

Common points of curves Student activity Play

Common points of the graphs of two functions Animation Play

Common points of the graphs of two functions – activity Whiteboard exercise Play

Common points of two lines in space Whiteboard exercise Play

Common points of two lines in space Student activity Play

Common tangents Student activity Play

Concave mirror, f < x ≤ 2f Whiteboard exercise Play

Concave mirror, f < x ≤2f Student activity Play

Concave mirror, x < f Student activity Play

Concave mirror, x < f Whiteboard exercise Play

Concave mirror, x > R Whiteboard exercise Play

Concave mirror, x > R Student activity Play

Conic sections Student activity Play

Constructing a line parallel to a given line Simulation Play