The angles of a polygon Student activity Play

The angles of a polygon Whiteboard exercise Play

The angles of a quadrilateral Student activity Play

The angles that are multiples of 45° Animation Play

The angles that are multiples of 60° Animation Play

The Angle–Side–Angle property – observations and generalisation Student activity Play

The area of a triangle Whiteboard presentation Play

The area of a triangle Animation Play

The area of a triangle Class activity Play

The ASA property Animation Play

The biggest possible area Animation Play

The central angle of a regular polygon Student activity Play

The central angle of a regular polygon Whiteboard exercise Play

The congruent trapezium Simulation Play

The congruent triangle Simulation Play

The content of a problem as an algebraic expression Student activity Play

The content of a problem as an algebraic expression Animation Play

The counterexample Whiteboard exercise Play

The cumulative frequency polygon Whiteboard exercise Play

The cumulative frequency polygon Student activity 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 exterior angles of a polygon Student activity Play

The exterior angles of an n-sided polygon Whiteboard exercise Play