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 Student activity Play

Circumscribed circles, inscribed polygons Animation 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

Construction of a tangent to a circle through a point not on the circle Animation Play

Construction of a tangent to the circle Simulation Play

Converging and diverging lenses Student activity Play

Coordinate geometry of a circle Whiteboard presentation Play

Coordinate geometry of a circle Class activity Play