Construction of a tangent Animation 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 an egg Animation Play

Construction of regular polygons Student activity Play

Coordinate geometry of a circle Whiteboard presentation Play

Coordinate geometry of a circle Class activity Play

Cosmology Animation Play

Curved space Whiteboard exercise Play

Curved space Student activity Play

Curved space Animation Play

Curvilinear motion Whiteboard presentation Play

Curvilinear motion Class activity Play

Density Animation Play

Derivatives of powers with rational exponent Whiteboard presentation Play

Derivatives of powers with rational exponent Class activity Play

Deriving the formula for the surface area of a sphere Animation Play

Determining the atomic radius Animation Play

Determining the signs of trigonometric functions Student activity Play

Discs in the coordinate system Student activity Play

Distance between centres of two circles Whiteboard exercise Play

Distance to the horizon Animation Play

Dividing a line segment Student activity Play

Dividing a line segment Simulation Play

Dividing the circle into six equal parts Animation Play