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

Forming a square from triangles Animation Play

Formula for the height of the equilateral triangle Animation Play

Heron's formula for the equilateral triangle Whiteboard exercise Play

Heron's formula for the triangle Student activity Play

How to check directly whether two triangles are congruent Student activity Play

How to check directly whether two triangles are congruent Whiteboard exercise Play

How to construct an equilateral triangle Animation Play

How to construct an equilateral triangle Student activity Play

Isosceles triangles Whiteboard exercise Play

Isosceles triangles Whiteboard exercise Play

Isosceles triangles and symmetry Student activity Play

Isosceles triangles and symmetry Whiteboard exercise Play

Isosceles triangles – solving problems Whiteboard exercise Play

Isosceles triangles – solving problems Student activity Play

Isosceles triangles – solving problems Whiteboard exercise 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

Kinds of triangles – classification by sides Simulation Play

Programming to draw regular polygons Student activity Play

Proof Animation Play