Exterior angle of a triangle Whiteboard exercise Play

Exterior angle of a triangle – exercises Student activity Play

Exterior angle of a triangle – observation and proof Student activity Play

Exterior angle of a triangle – proof Animation Play

Exterior angles Animation Play

Exterior angles in a triangle Simulation Play

Exterior angles in a triangle – proof Animation Play

Exterior angles in quadrilaterals Whiteboard exercise Play

Exterior angles in quadrilaterals Student activity Play

Exterior angles in quadrilaterals – a game Game Play

Exterior angles of a triangle Student activity Play

Figures made up from four strips Animation Play

Find the angle Whiteboard exercise Play

Find the right region Student activity Play

Finding angle Whiteboard exercise Play

Finding angle Whiteboard exercise Play

Finding angle – obtuse triangle Whiteboard exercise Play

Finding angles Whiteboard exercise Play

Finding angles Whiteboard exercise Play

Finding angles Student activity Play

Finding angles Student activity Play

Finding angles Student activity Play

Finding angles Whiteboard exercise Play

Finding angles in a triangle Student activity Play

Finding angles in a triangle Whiteboard exercise Play