The circle Class activity Play

The circle and its equation Animation Play

The circle and the equilateral triangle Student activity Play

The circle with centre at an arbitrary point Whiteboard exercise Play

The circle with centre at the origin Whiteboard exercise Play

The circle with centre at the origin Student activity Play

The clock Animation Play

The composition of two enlargements Animation Play

The distance between the images Animation Play

The distance between the images – the rectangles Whiteboard exercise Play

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

The equation of a circle with centre at an arbitrary 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 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 figures under enlargements Whiteboard exercise Play

The first tangent theorem Animation Play

The first tangent theorem – perpendicularity Student activity Play

The five-number summary for the population of Europe's 23 largest cities Whiteboard exercise Play

The focal point of a concave mirror Simulation Play

The focal point of a concave mirror Student activity Play

The formation of an image by a spherical mirror Student activity Play

The formation of an image by a spherical mirror Simulation Play