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

How to construct an isosceles triangle Student activity Play

Isosceles trapeziums Simulation 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

Kinds of triangles – classification by sides Simulation Play

More constructions Student activity Play

Property of enlargement – the triangles Whiteboard exercise Play

Reasoning with angles Student activity Play

Recognition of congruent triangles Animation Play

Ruler-and-compass constructions Whiteboard presentation Play

Ruler-and-compass constructions Class activity Play

SAS property of similar triangles Student activity Play

SAS property of similar triangles Whiteboard exercise Play

Sides of the triangles Animation Play

Solving triangles Student activity Play