Trigonometry of a general angle Whiteboard presentation Play

Two right-angled triangles Whiteboard exercise Play

Types of triangles Animation Play

Types of triangles – activity Whiteboard exercise Play

Unknown angle in a triangle Animation Play

Unknown side of a triangle Animation Play

Use of a calculator Class activity Play

Use of a calculator Whiteboard presentation Play

Using Heron's formula Animation Play

Using the law of sines Whiteboard exercise Play

Using the pressure equation triangle Animation Play

Using the pressure equation triangle Animation Play

Using the sine rule Whiteboard exercise Play

Using the sine rule Student activity Play

Vertical and supplementary angles in a triangle Simulation Play

Vertical angles – revision Student activity Play

Vertices of the triangle Whiteboard exercise Play

Volume of a cone Student activity Play

Volume of a frustum of a cone – rotating a right-angled trapezium Whiteboard exercise Play

Volume of a prism Student activity Play

Volume of a right prism Whiteboard exercise Play

What is a perimeter? Student activity Play

What is a perimeter? Animation Play

What shapes do you see? Student activity Play

When is a theorem false? The counterexample Student activity Play