The angles of a quadrilateral Student activity Play

The angles of a trapezium Whiteboard exercise Play

The angles of a triangle Simulation Play

The angles of a triangle Animation Play

The angles of an isosceles triangle Whiteboard exercise Play

The angles of isosceles triangles 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 appropriate range of angles Whiteboard exercise Play

The base angles and the vertex angle Whiteboard exercise Play

The cosine – reducing angles Student activity Play

The cosine – reducing angles 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 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 height of a tree Whiteboard exercise Play

The interior angles of a polygon Student activity Play

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

The interior angles of polygons Whiteboard exercise Play

The LOGO commands to obtain the given triangle Whiteboard exercise Play