Centre of enlargement Student activity Play

Centroid of a triangle Animation Play

Characteristic rays Animation Play

Choosing the right points Animation Play

Chord bisector goes through the centre Student activity Play

Circle in the Cartesian coordinate system Whiteboard exercise Play

Circle inscribed into a parallelogram Simulation 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 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

Constructing a line parallel to a given line Simulation Play

Constructing a perpendicular to a given line Simulation Play

Constructing a perpendicular to line at a point off the line Simulation Play

Constructing the simplest mathematical model Whiteboard exercise Play

Construction of a square Simulation Play

Construction of a tangent to a circle Animation Play