The angles that are multiples of 60° Animation Play

The area of a circle Whiteboard presentation Play

The area of a circle Student activity Play

The area of a circle Whiteboard exercise Play

The area of a circle Class activity Play

The area of a triangle Whiteboard presentation Play

The area of a triangle Class activity Play

The area of a triangle circumscribed about a circle 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 content of a problem as an algebraic expression Animation Play

The content of a problem as an algebraic expression Student activity 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

The exterior angles of polygons Whiteboard exercise Play

The four angles Whiteboard exercise Play

The hexagon and the square Whiteboard exercise Play

The interior angle of a regular polygon Student activity Play

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