Angle between two vectors – acute, obtuse and right Whiteboard exercise Play

Angle between two vectors – acute, obtuse and right Student activity Play

Angles in 2-D shapes Class activity Play

Angles in 2-D shapes Whiteboard presentation Play

Classification of triangles by angles Animation Play

Finding angle – obtuse triangle Whiteboard exercise Play

Finding angles Student activity Play

Kinds of angles Simulation Play

Kinds of angles – reminder Student activity Play

Kinds of triangles – classification by angles Simulation Play

Kinds of triangles – classification by angles Student activity Play

Kinds of triangles – classification by angles and sides Simulation Play

Kinds of triangles – classification by sides Student activity Play

Lines and angles Whiteboard presentation Play

Lines and angles Class activity Play

Obtuse angles Whiteboard exercise Play

Obtuse angles Student activity Play

Proofs and assumptions Student activity Play

Proofs and assumptions Whiteboard exercise Play

The floating buoy Animation Play

The sine rule (the law of sines) Student activity Play

Triangles Whiteboard exercise Play

Triangles – part IV Student activity Play

Types of angles Animation Play