Trigonometric ratios in a right-angled triangle Class activity Play

Trigonometric ratios – a lighthouse Whiteboard exercise Play

Trigonometric ratios – distance to a star Whiteboard exercise Play

Trigonometric ratios – problems Student activity Play

Trigonometric ratios – the altitude of the Sun Whiteboard exercise Play

Trigonometric ratios – the angles of the triangle Whiteboard exercise Play

Trigonometry of a general angle Whiteboard presentation Play

Trigonometry of a general angle Class activity Play

Triiodide ion molecule Animation Play

Trisecting an angle Animation Play

Two isosceles triangles Whiteboard exercise Play

Two mirrors Animation Play

Two mirrors Animation Play

Two perpendicular symmetry lines Animation Play

Two points on the shoreline Animation Play

Two reflections in two perpendicular mirror lines Whiteboard exercise Play

Two right-angled triangles Whiteboard exercise Play

Two vectors and the angle between them Whiteboard exercise Play

Types of angles Animation Play

Types of pyramids Student activity Play

Types of pyramids – regular pyramid Simulation Play

Types of pyramids – right pyramid Simulation Play

Universal gravitation Student activity Play

Universal gravitation Whiteboard exercise Play

Unknown angle in a triangle Animation Play