Finding the area Whiteboard exercise Play

Finding the centre of a circle Student activity Play

Finding the centre of a circle Simulation Play

Finding the centre of the incircle of the triangle Simulation Play

Finding the centre, the radius and the equation of a circle Student activity Play

Finding the five-number summary Student activity Play

Finding the radius and the centre of a circle Whiteboard exercise Play

Hidden circles Whiteboard exercise Play

Hidden circles Student activity Play

How far is the horizon? Student activity Play

How to construct 'Yin Yang' Animation Play

How to determine the centre of gravity Student activity Play

How to determine the centre of gravity Whiteboard exercise Play

How to determine the centre of gravity Animation Play

How to find the centre of gravity? Animation Play

Images in lenses Student activity Play

Inscribed angle in a semicircle Student activity Play

Inscribed right angle Animation Play

Inscribed right angle Whiteboard exercise Play

Is it translation or rotation or reflection? Student activity Play

Journey to the centre of the Earth Student activity Play

Journey to the centre of the Earth Whiteboard exercise Play

Linear inequalities Student activity Play

Measuring distances on maps Student activity Play

Miscellaneous exercises Student activity Play