The derivation of Snell's Law Animation Play

The distance between the images Animation Play

The distance between the images – the rectangles Whiteboard exercise Play

The domain of the trigonometric functions Animation Play

The enlargement of the triangle Animation Play

The equation of a circle going through a point Student activity Play

The equation of a circle with centre at an arbitrary point Simulation Play

The equation of a circle with centre at an arbitrary point Student activity Play

The equation of a circle with centre at the origin Student activity Play

The equation of the circle Animation Play

The equation of the circle Student activity Play

The equation of the circle with centre at an arbitrary point Whiteboard exercise Play

The exterior and interior angles of a quadrilateral Whiteboard exercise Play

The exterior and interior angles of a triangle Whiteboard exercise Play

The exterior angle of a regular polygon Student activity Play

The exterior angle of a regular polygon – proof (1) Animation Play

The exterior angle of a regular polygon – proof (2) Animation Play

The figures under enlargements Whiteboard exercise Play

The first tangent theorem Animation Play

The first tangent theorem – perpendicularity Whiteboard exercise Play

The first tangent theorem – perpendicularity Student activity Play

The floating buoy Animation Play

The focal point of a concave mirror Simulation Play

The focal point of a concave mirror Student activity Play

The force is at some angle to the direction of the movement Animation Play