The Side-Angle-Side property Whiteboard exercise Play

The Side-Side-Side (SSS) property Whiteboard exercise Play

The sides of isosceles triangles Student activity Play

The sides of the triangles – trigonometric ratios for selected angles Whiteboard exercise Play

The Side–Angle–Side (SAS) property – observations and generalisation Student activity Play

The Side–Side–Side (SSS) property Student activity Play

The SSS property Animation Play

The sum of a convergent geometric series – triangles Whiteboard exercise Play

The symmetry of isosceles triangles Animation Play

The symmetry of triangles Whiteboard exercise Play

The triangles under enlargement Whiteboard exercise Play

Triangles Class activity Play

Triangles Whiteboard exercise Play

Triangles Student activity Play

Triangles Whiteboard exercise Play

Triangles Whiteboard presentation Play

Triangles Whiteboard exercise Play

Triangles Student activity Play

Triangles and squares in coordinates Whiteboard exercise Play

Triangles in LOGO Student activity Play

Triangles symmetrical with respect to a line Whiteboard exercise Play

Triangles symmetrical with respect to a point Whiteboard exercise Play

Triangles – part I Student activity Play

Triangles – part II Student activity Play

Triangles – part III Student activity Play