Enlarging the right-angled triangle – the basic property Simulation Play

Estimation of the volume Animation Play

Exact values of trigonometric ratios for selected angles Animation Play

Exact values of trigonometric ratios for selected angles Student activity Play

Examples of regular polygons Student activity Play

Examples of rotation Student activity Play

Examples of surds Animation Play

Exercises about the ratio of two quantities Student activity Play

Exterior and interior angles of a triangle Student activity Play

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 of a triangle Student activity Play

Figures in a coordinate system Student activity Play

Figures in coordinates – part 1 Student activity Play

Figures symmetrical with respect to a point Student activity Play

Finding angle Whiteboard exercise Play

Finding angle – obtuse triangle Whiteboard exercise Play

Finding angles Student activity Play

Finding angles in a triangle Whiteboard exercise Play

Finding angles in a triangle Student activity Play