Construction of triangles Animation Play

Corresponding segments and angles – reflection Animation Play

Corresponding segments and angles – rotation Animation Play

Creating symmetrical triangles Whiteboard exercise Play

Dividing an equilateral triangle Animation Play

Dividing an equilateral triangle into nine congruent triangles Whiteboard exercise Play

Dividing an n-sided polygon into triangles Animation Play

Dividing the polygon into triangles Whiteboard exercise Play

Drawing symmetrical triangles Animation Play

Equilateral triangles Whiteboard exercise Play

Fingerprints Animation Play

Forming a square from triangles Animation 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

Isosceles triangles Whiteboard exercise Play

Isosceles triangles Whiteboard exercise Play

Isosceles triangles and symmetry Whiteboard exercise Play

Isosceles triangles and symmetry Student activity 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